How smart is /b/?

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Niggers

Smarter than you OP. How smart do you think it is to post the same question every day?

>>727453621
people are gonna say its 1/3 but real men know its 1/2

>>727454122

>retards think it's 1/2

FTFY

50% we know that 1 is always heads and so can be excluded and because the other coin has a 50% chance,it is 50%

>>727454237

Retard detected.

Either coin could be tails, faggot. Just not both at the same time. 3 equally likely ways to get at least 1 heads coin
HH, HT, TH

Answer is 1/3

You're bad at explaining this, go fuck yourself.

Think about a situation where you just flip two coin, fuck what it says in the OP, Op is a nigger and a faggot.

Now take the results, and get rid of all the TT. Fuck tails. Tails are for furfags, yiff in hell.

3:???

PROFIT. (the results you are left with is the correct probability, which logically would be about 25 for each, if the test was done 100 times, which equates to 1/3)

>>727454348
We know that one will always be heads so that is a 100% chance we can then discount it, regardless of which coin it is, and be left with 1 coin which has a 50/50 chance

>>727454348
Tell me this, what was the question?

>>727454869
Meant to reply to >>727454348

>>727453621
It's easy to appear smart when you ask the question whilst already knowing the answer.

1/3

For those who havent seen this before, its a propability question made to trick people, short explanation would be that you think we know which coin is heads, but we dont, so HT and TH are different, you can even test this yourself and confirm that it is infact 1/3.

It says "one of them landed heads" not " the first one landed heads" and this changes the conclusion.

If one them is heads, we have:
HH
HT
TH
aka 1/3 for both being heads

if first is heads then:
HT
HH
Which is 1/2 of both being heads.

>>727455444
it also says "were flipped"

>>727454915
>We know that one will always be heads
No, you don't, you retard. 2 regular coins were flipped and at least 1 landed heads by chance. Could be either coin. 3 equally likely ways to get at least 1 heads coin

coin1=heads, coin2=heads
or
coin1=heads, coin2=tails
or
coin1=tails, coin2=heads

1/3

>>727454968
It's right there in the OP.

1/3

>>727456205
wow please tell me this is bait, I can't live in a world with retards like this

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>>727456414

But he's right, you moron. Are you b8ing?

1. flip two coins
2. see that one landed on heads
3. calculate the probability that the other one landed on heads
4. see that it's 50%
5. kill yourself when some retard tells you you're wrong
have a nice day

>>727453621
25% because im not a fuckin retard

>>727453621
Using Baye's rule we know the probability to be 1/64

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>>727456910

>>727456617
if you take a coin and place it heads up, then flip another one the chance of HH is 1/2

if you flip a coin, then place the second one heads up the chance of HH is 1/2


make sense?

>>727456908
/thread

>>727453621
This question is boring, let's do this one:

There are three doors:

[1] [2] [3]

Behind one of these is the prize and you can only pic a single door.

Let's say you chose 1:

l
l
V
[1] [2] [3]

It has been revealed to you that door 3 is not the winner.

Current choice:

l
l
V
[1] [2] [X]

Wanting to choose the door that is most likely to win, which do you choose?

(hint: it is not a 50/50 chance)

>>727457405
it was 1/3 when you chose 1
3 is revealed but you have already chosen 1

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>>727457405
Ok, this one is just horseshit.

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>>727453621
the question is ambiguous and this thread is bait.

if the statement "at least one is head" is made OBSERVING only one coin:
1/2

if the statement "at least one is head" is made OBSERVING both coins:
1/3

and both are valid interpretations,
the first one is more pratical (why should i want to calculate the probability if i can observe both coins?)
the second is more literal.


arguing if the answer is 1/2 or 1/3 pathetic and retarded.

>>727457972
dude...
if one coin is 100% heads, regardless of which one you observe, the other is 50% heads
there is only one answer

>>727457627
It was 1/3 for door 1 at the start, but what is it now that 3 was eliminated?

>>727457628
Nah, I'd tell you what this problem was called, but that would give away the answer.

>>727458128
nope.
if you are to stupid to understand both answers go back to study math.

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Stay in school, kids

>>727458319
>If you are to stupid
>to stupid

>>727458151
I know what it is, it's the stupid fucking goat one and it doesn't make any logical sense no matter how you slice it.

>>727457300
>if you take a coin and place it heads up, then flip another one the chance of HH is 1/2
Yes, but that's not the same as the OP question, you fucktard. OP question doesn't "fix" either coin. Either coin could be tails, just not both at the same time.

Flip 2 coins. At least 1 landed heads. Could be
Heads - Heads
or
Heads - Tails
or
Tails - Heads

All 3 of those are EQUALLY likely.

1/3

>>727457972
/thread

>>727456908
>2. see that one landed on heads

That's not the same as the OP question, moron.

>>727457972

no, faggot. It's a basic conditional probability question and there is one correct answer.

The correct answer is 1/3.

>>727453621
The coin has no memory of the results of the last flips so 50/50 each time, pretty simple

>>727458692
How is it not the same?

>>727458492
>it doesn't make any logical sense no matter how you slice it.

It makes perfect sense. You're just a moron.

1/3 for OP.

Switch for goat problem.

>>727458492
I'm sure what you mean by logical sense, but in terms of just probability it makes total sense.

https://www.youtube.com/watch?v=7u6kFlWZOWg

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>>727458442
>>727458319
>MFW he tells me to study math
>MFW I study aerospace engineering
>MFW this capcha

>>727458789
No it doesn't. 3 doors, 2 with goats, one with car or some faggot shit. You pick one, then one of the goats is taken away, do you switch your door or not. It makes NO fucking sense that switching would change a fucking thing but you're gonna sit there and tell me it does.

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>>727458761

Because you're not told which specific coin (i.e. you do not see) landed heads. you are only told that at last 1 landed heads.

For a 2 coin flips, there are 3 equally probable ways to get at least 1 coin landing heads. Pic Related

1 of those 3 ways is both heads.

1 of 3 equally likely outcomes

1 of 3

1/3

>>727458692
It doesn't matter which coin it is if one is guaranteed to be heads. So you only have to account for one coin when calculating probability in this case.

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>>727458789
>Switch for goat problem.

The people saying it's 1/3 aren't taking their own point into consideration.
If #1 is heads the options are
HT
HH

If #2 is heads the options are
TH
HH

So the outcomes are
TH
HT
HH
HH

It's still double heads 1/2 of the time.

>>727457405
It is 50/50 because you are fucking retarded and you haven't explained the rules of reveleaing doors.

if you don't explain
>the door revealed is never your choice
>the door revealed is always a wrong one
>you ALWAYS have the chance to change
the problem is stupid, and in the situation you explained the answer is 50/50

if you explain them, it is better to change (2/3)

>>727458442
sorry i missed a letter. grow up

>>727457405
You pick door 2
Too tired to explain
Fuck off back to year 2 in engineering uni

>>727458975
nice table but you forgot t t

>>727453621
Flip a physical coin, x times, results? Oh, you had only two possible values? Damn I thought-

75%

>>727458972
>No it doesn't. 3 doors, 2 with goats, one with car or some faggot shit. You pick one, then one of the goats is taken away, do you switch your door or not. It makes NO fucking sense that switching would change a fucking thing but you're gonna sit there and tell me it does.

You retarded fuck. Let me explain.

instead of 3 doors, let's say there are 100 doors.

Behind 1 door there is the prize, a car.

behind the other 99 doors are goats.

You pick a door at random.

your chance of winning the car is 1 out of 100 (1/100) at this point.

that means that there is a 99/100 propability that the prize is behind 1 of the doors you did not pick.

now I open 98 losing doors, revealing goats behind all of them.

you are left with the door you picked (1/100 chance)
and one other door (99/100 chance)

If you switch, you are 99 times more likely to win teh car.

Do you understand?

you should always switch.

Answer to OP is 1/3

>>727458975
You don't have to know which one is heads to elimate one of the coins. It doesn't matter which one is heads. HT and TH can't both be possible if one coin is already heads.

>>727453621
This thread reminds me so much of finger boxes and flat earth. wonder why?

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>>727458972
>>727458865
>>727458789
Fuck, never mind. Every fucking time this comes up I have to have someone re-explain it. I should just bookmark that video under 'CLICK THIS BEFORE YOU SAY IT DOESN'T MAKE SENSE'.

>>727459374
*eliminate

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>>727453621
the people in this thread must be fucking baiting

if there is a 100% chance that one of the coins will be heads, it might as well be taken out of the question. What we're left with is ONE (1) coin, with a 50% chance of landing heads.

my god

There is a 50% chance that the unknown coin is heads, meaning there is a 50% chance that both are heads.

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>>727458888
>mfw when i don't care about your opinion because i know i'm correct

>>727459373
Yea yea, fuck off... I'm a tard, I know. Stupid fucking goats.. I'M NOT GOING TO BE ON A GAME SHOW ANYWAYS WTF DOES IT MATTER!

>>727459373
But if you started with only the two doors, the chance would be 50/50

It could be heads or tails.
2 possible values.
Divide 100% / 2.
Simple stuff, this is a long gone meme

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>>727458982
>if one is guaranteed to be heads.
>guaranteed to be

No coin was guaranteed to be heads, you retarded fuck. At least 1 coin landed heads by chance. it could be EITHER coin or botch, meaning that EITHER coin could be tails, just not both at the same time.

There are 4 possible outcomes when you flip 2 coins. Both tails (TT) is the ONLY outcome not possible given the condition that at least 1 coin landed heads.

the other 3 outcomes (HH, HT, TH) are all still possible AND equally likely.

1/3

>>727459164
>The people saying it's 1/3 aren't taking their own point into consideration.

HAHA, let's see where this retard takes us.

>If #1 is heads the options are
>HT
>HH
Correct

>If #2 is heads the options are
>TH
>HH
Correct

>So the outcomes are
>TH
>HT
>HH
>HH

You just listed 1 result (HH) twice, you stupid faggot.

there are 3 possibilities
HH
HT
TH

1/3

>>727459324
>nice table but you forgot t t
TT isn't possible given the condition that at least 1 landed heads, fam.

>>727459840
That changes the dynamic though, the probability at the get-go is 50-50, there's no doors to take away.

>>727459809
>i don't care about your oppinion but im gonna reply annyway

>>727459939
>replying means caring

>>727460038
>still replying

>>727459852
Still better than FB fap threads

>>727459910
see>>727459374

HT and TH can't both be possible at the same time if one coin is already heads

>>727459254
>It is 50/50 because you are fucking retarded and you haven't explained the rules of reveleaing doors.

The host wouldn't explain the rules or the math to the contestant, these conditions are implied anyway so the wording wouldn't change the answer.

>>727459374
>HT and TH can't both be possible if one coin is already heads.

Hmm, let's see.

The condition: At least 1 coin landed heads.
Does HT contain at least 1 heads? Yes
Does TH contain at least 1 heads? yes

Both are possible, faggot, as is HH. Only TT is not possible given the condition.

1/3

>>727460112
still doesn't mean i care about your answer to question

>>727459629
>if there is a 100% chance that one of the coins will be heads

There isn't. Now try again.

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>>727460131
True, true

>>727457405
https://en.wikipedia.org/wiki/Monty_Hall_problem

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>>727453621
>How smart is /b/?

Smart enough to not eat the bait.

>>727459766
>There is a 50% chance that the unknown coin is heads
>unknown coin

Both coins are variable, retard. Either could be tails, just not both simultaneously.

1/3

>>727460143
they cant be the both possible at the same time because they are different.
in both TH and HT one coin is heads, we dont know which one, so they are equally likely.

please tell me you are either bating or learning.

>>727460197
both are possible, but not at once
so its the probability of getting (HT or TH) or HH which is 50%

>>727460223
>guys i don't care
>rly i mean it
>pls listen to me
>look at me i dont care

>>727460309
>Replying
Baited though

>>727459835

It's alright, fam. Calm down. Probability is counter intuitive.

>>727460340
we don't know which one but we do know it's one of them so we treat both as one option
therefore 1/2

>>727460161
ofc if the host apply the rules without telling you the probability is 2/3.

but if you ask the question you still have to explain them.

it like if i say to you "i throw a dice what is the chance of 1" but i don't tell you how many faces the dice has.
ofc the probability is only one, but if you don't have the rules you can't calculate it.

>>727460309
hah, stupid idiot.
I take the bait because there is no hook, think of it as a old man sitting in the part throwing pieces of bread for ducks to eat, im the duck and i enjoy the feast while the old man feels a bit better about himself.

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>>727460143
>HT and TH can't both be possible at the same time

Wow, really? What a fucking revelation, retard.

Guess what else?
HT and HH can't both be possible at the same time

and do you know what else?
HH and TH can't both be possible at the same time

Amazing, huh?

1/3

>>727460484
we cant treat 2 separate things as one option, are you fucking stupid?
test is, you have 2 coins right? or are you afraid that you are wrong?

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>>727460348

You're fucking retarded.

Answer the pic related if you're not b8ing.

I see where some of you are wrong. Some of yah are thinkin that one is already set at heads but it aint. Its just confirmed that one would be heads so it could be tails-heads, heads-heads, or heads-tails. Understandable mistake for sure.

>>727454235
>>727454348
>>727454869
>>727455214
>>727456205
>>727456617
>>727457627

Probability is HH

your counter is that
T H, and H T are different values

if T+H =/= H+T is the math you have learned that what is
XY = YX ?

This isn't some pemdas shit you're just autistic

>>727460366
>shit the question is too hard i can't solve it
>better shit post

>>727460484

TH, HT and HH are all separate events, you stupid fuck.

1/3

>>727460543
It doesn't matter which landed heads first, I'm sure you can prove that by using two coins in front of you.

>>727460757

This isn't addition or multiplication, you thick cunt. It's conditional probability.

HT does not mean H x T.

Jesus fuck you better be trolling.

1/3

>>727460772
If i fuck your mom you're saying there's two events because she fucked me

Us bombed Hiroshima

Hiroshima got bombed by US
US bombed hiroshima

is still the same event autist

>>727460543
>>727460651
guy look

two coins are flipped -> they're already flipped, they WILL NOT change
ONE of them is HEADS -> WE DON'T KNOW WHICH ONE
so far, our options are HH, HT, TH
Considering the case it was HT it's impossible for TH to have been an option
Considering the case it was TH it's impossible for HT to have been an option
so if it was HT the probability is 50%
or if it was TH the probabilty is still 50%

they're mutually exclusive

>>727460759
>changing the subject
are you mad, kid?

>>727453621
two possibilities, one head and one tails or two heads.

So 1 in 2 chance

>>727460693
50/50/4
25/25/25/25/2
12.5%

>>727460948

Well we know your level of comprehension now.
That's why you couldn't even comprehend the statement in the picture.

Its literally in front of your eyes T+H yet you interpreted it as H x T

I think we're done here

>>727460693
https://en.wikipedia.org/wiki/Boy_or_Girl_paradox

study it before trying to look smart, you don't.

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>>727460824

Listen moron.

Take 2 coins. Flip them 100 times. you should get

HH ~ 25 times
HT ~ 25 times
TH ~ 25 times
TT ~ 25 times

Now count how many time you got at least 1 heads
Answer = 75 times

Now count how many times you got 2 heads
Answer = 25

25/75 = 1/3

>>727460757
Nigger, if TH comes up 1/3 of the time, HT comes up 1/3 of the time, and HH comes up 1/3 of the time, it's still 1/3 probability that HH comes up, vs 2/3 not HH.

>>727460949
damage control much? fucking test it you idiot.
TH and HT are not the same, no matter how many times you deny it, it doesnt make you right.

>>727460949
my sides

>>727453621
Ez
It's 1/3 because the coin could land on the edge and not land on either heads or tails

>>727460949

HT and TH are separate and distinct outcomes, you absolute simpleton.

take a penny and a quarter. Flip both of them.
You could get both heads, or both tails, or you could get
Penny = heads, Quarter = tails
or
Penny = tails, Quarter = heads

Can you see how those are different, you retarded fuck?

1/3

>>727458517
but heads tails, tails heads is the same, so its head head, head tails/tails head. so 50/50

>>727460984
but we dont know which one it is, we know propability is very counter intuitive, which is why you should fucking test it, you will realise very quickly that its actually 1/3, but you can also just live in your make believe land, the choice is yours.

>>727461140
>>727461277
>>727461184
>>727461149
see>>727460984

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>>727461083
Try again, but turn your nerd rage off.

>>727461140
One coin is flipped, how many values can the other take?

>>727461336
>>727461371

see >>727461348

TEST IT YOU FUCKING RETARDS, ITS SO OBVIOUS!

>>727461149
>>727461152

How do you know it wasn't the same regular coin that was flipped then? Your only argument is that it's like this because it's two different coins.

It never said it was two DIFFERENT coins

Two regular coins were flipped, it can be the same regular coin flipped once, as the second regular coin flipped turned out to be the same one used.

gtfo of my library

>>727460984
>Considering the case it was HT it's impossible for TH to have been an option
That equally applies to HH, you fucking moron.

Allow me to explain using amazing logic.

>If you get HT, you didn't get HH or TH
>If you get TH, you didn't get HH or HT
>If you get HH, you didn't get HT or TH

Amazing, right?

1/3

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>>727453621
I flipped two coins once where one landed on my dicks head. The other landed on my foot. My nigger detector just went to outer orbit. Stay away from the bath salt gummies prick.

>>727461041
>one head and one tails or two heads.

there are 2 equally likely ways to get one heads and one tails, simpleton.

1/3

>>727461371
Doesn't account for the coin landing on it's edge retard. God I wish trump would deport you already

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>TFW people are retarded and can't even understand a wikipedia page so they keep arguing over an ambiguous question for years

>>727461418
The only people getting offended are
-troll victims
-Autists getting triggered by being called out

>>727461578
One coin has been flipped, how many values can the other one have?

>>727461515
no it doesn't, it's not about what you got, it's about what is possible to get

if one out of two coins is heads you can get HT or TH but not both

>>727461499
What the fuck...

>>727461499
you can do the test with 1 coin, doesnt make a difference
the results look like this >>727461140

its 1/3 and you have still not tested it, how do i know? because you still think its 1/2

Easy .5

>AP Statsfag here

You're all faggots, this question basically come down to this

How many genders are there?

Obviously you got your trap and gay faggots trying to defend their right to suck dick and remain straight

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>>727461083

>this isn't addition

Troll harder, bud.

>>727461119
OP question is not a paradox, dumbfuck. It's a basic conditional probability question.

1/3

Source
http://courses.cs.washington.edu/courses/cse312/11wi/slides/04cprob.pdf

>>727461731
how is it 1/3 if there's only 1 coin and two results

poorly worded question
1. what is the probability of two heads? (.25)
2. what is the probability of one heads? (.5)
2. what is the probability of two heads if one coin is already head? (.5)

>>727461773
One coin has been flipped, how many values can the other one have?

>>727461760
/thread

>>727461811
test it and you'll see, i cant believe you still havent.

>>727461459
it doesnt matter which one it is it still counts as one outcome

>>727461863
which happens 2/3 times, test it and you will see.

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>>727461578
Oh yeah you're right

>>727461336
>but heads tails, tails heads is the same

No.

Read >>727461277

1/3

>>727453621
Look op
The probability doesn't matter. What really matters is what the coin feels. Please don't force your beliefs onto others

>>727461813
what is the probability of you being wrong? (1)

>>727461997
One coin has been flipped, how many values can the other one have?

>>727462008
First time I've seen someone post the right answer.

>>727461862
1=A, always heads
Lets flip it
it can be H or T
1A~H 1/2
1A~T 1/2

Where do you see the 3?

its 50%. the second coin doesn't give a fuck if the first one was heads or not. its a coin being flipped, it's random every time.

>>727461678
>if one out of two coins is heads you can get HT or TH but not both

if one out of the 2 coins is heads, you can't get HH, simpleton.

I flip 2 coins. At least 1 landed heads. So I could have
HH or HT or TH

All 3 are equally likely.

1/3

>>727461997
they are not seperate outcomes, it doesnt matter of tails lies left or right, its the same, its about one coin deciding

>>727462044
that question is irrelevant to the question OP prestented and you not seeing why is the problem.
test it and you will see, or stay blind.

>>727461659
>One coin has been flipped, how many values can the other one have?

That's not the same as OP question, dumbass.

>>727462103
correct

>>727462157
yes it is

>>727462113
you just said I can't get HH

But then you said
>I could have HH or HT or TH
__ or HT or TH

We should've just dropped a third bomb then you'd at least be right

>>727462157
Lol. Yest it is.

>>727456910
TT can be ruled out since the question states at least one flip results in heads

So ruling out TT gives you a 1/3 chance, not 1/4

>>727461773
It is the same exact question retard.
Solved nearly 60 years ago.

If you still can't understand it even reading wikipedia i'm sorry for you.

>>727461620
>ambiguous question
>basic conditional probability

I told you already this isn't the girl/boy paradox, faggot.

1/3

>>727462149
I just took the red pill, just a bit tired of this meme, it should be replaced maybe, got no idea how trends work

>>727462103
>>727462225
there is no first or second coin.
test it.

i wonder how many times i need to tell people to test it before someone actually does.

>>727462113
no you have HH or (HT or TH)
they are not all equally likely since one two of the possiblility are mutually exclusive

>>727461830
>One coin has been flipped, how many values can the other one have?

Not the OP question.

try again.

>>727462305
it is, learn to read.

>>727462406
fuck
*they are not all equally likely since two of the possiblilities are mutually exclusive

>>727462338
no, you dont understand, it doesnt matter which one of the coins gets the head or tail. its the same result

>>727462456
its not, learn to think.

>>727462433
ask some fucking prof or something, youre wrong

>>727453621
Love these threads. So original. So funny. So effective. I don't want to live on this planet anymore.

>>727462097
>1=A, always heads
>always heads

You went wrong here.

1/3

>>727462103
Both coins are variable. the only outcome not possible given the condition is Tails,Tails.

HH or HT or TH all equally likely.

1/3

>>727462433
Well, when you answer this, you get the question's answer. Go on

>>727459372
You should be a professional gambler

You can blame the house for all your losses because your math is impeccable

>>727462489
yes and the result is 1/3

I've seen this thread about 50 times and the first time i was like you, demanding it was 50/50, but after testing it i realised i was wrong.

You should do the same.

>>727462562
>can't read the second question
>can't understand boy = head and girl = tails
>tell other to think
pathetic

>>727453621
Assuming the question can be rephrased accurately as follows:
For the subset of all possible outcomes where two coins are flipped and one coin lands heads up. What is the probability that the other coin will land heads up?
The answer is 0.5.

>>727462604
These dudes need help right, its 50%

>>727462248
>you just said I can't get HH

Yes, learn to read properly and you'll understand why I said that and why it's correct.

>>727462406
>no you have HH or (HT or TH)
HH = 1/3
HT or TH = 2/3

1/3

>>727462625
HH is equally likely as either HT or TH
all three are not equally likely

>>727462625
1+3=5
5-3=2
1+1=3

>>727462676
JOIN US

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>>727462597

I am a prof, retard.

Source
http://courses.cs.washington.edu/courses/cse312/11wi/slides/04cprob.pdf

1/3

>>727462717
That's the easy way out faglord. What's the probability of flipping two coins and both landing as hands

>>727455444
>>727456205
Holy fuck the autism is real.

HT = TH they are one value. You're over thinking this you colossal fucking shit stain. It's asking specifically about the OTHER COIN THAT ISN'T HEADS. 1 coin you jizz stain. 50%-50% value.

>>727462753
no
HH = 1/2
TH or HT = 1/2

TH and HT are mutually exclusive

>>727462705
>doesnt understand probability
>thinks this is the boy and girl problem
>doesnt want to think about it in fear of being wrong
>still hasnt tested it in fear of being wrong
Are you even trying?

>>727462456

No, it isn't. Stay in school.

>>727462833
HT/TH or whatever the fuck you want to call it will STILL happen twice as frequently as HH.

>>727462775
kek

>>727462833
still havent tested it i see.

>>727460348
>Lists 3 possible outcomes, only 1 of which is the outcome we are looking for
>Somehow not a 1/3 chance

>>727462925
NO IT WON'T, ITS ASKING ABOUT THE COIN THAT ISN'T HEADS!!! Hoe the fuck did you get out of grade school?

>>727462803
its american, i cant expect a correct study

File: coinss.jpg (119KB, 1600x900px) Image search: [Google]

119KB, 1600x900px

>>727462763

you're dumb, m8.

The answer is 1/3.

Pic Related: Bayes theorem proof with Venn Diagram for braindead simpletons who think that HT is the same TH.

1/3

>yfw simpletons don't know what Bayes' theorem is

>>727462866
>>727462887
is this the american education they were talking about?

>>727463072
still havent tested it i see

A, B.
a, b.
A = a result (since we know, it was the first).
B = a || b.

>>727463070
>mutual exclusivity
probability isn't always just averaging the outcomes

>>727463072
first one burst, we got it bois

File: CoinsSimulation.png (111KB, 641x650px) Image search: [Google]

111KB, 641x650px

>>727463096
>study
>Bayes' theorem

kek

1/3

Pic Related: Simulation confirms

>>727463161
Well if they teach its 50/50 then its pretty bad.

>>727463072
It's not asking for the probability of one coin.

>>727462803
What is the probability of birthing a female (HH) after already birthing a female?

1- (HH) [XX]
2- (HT) [XY]
*3* -(TH) [XY]

whoa! it's the same result! holy balogna!

1/3 is only right because it's the same as 1/2 so 1/2 is even more right

>>727462833
>HT = TH they are one value

Ah, no. Just because they LOOK the same does not mean that they ARE the same. Don't ever have children, you retarded fuck.

1/3

>>727462925
>>727462974

SO I may have miss read the question. 1/3 is the correct answer. I read "What is the chance of one coin is always heads?"

Sorry, im wrong, I'm the shitstain.

>>727463150
Event B = HT or TH
FTFY

you literally did it wrong

>>727463298
no, they don't teach english, apparently.
or that the question is the same if you change variables names.

>>727453621
The chance is significantly greater than that of a statistician getting laid any time soon.

>>727463323
the female egg alwasy has an X, in the coin situation the same coin isnt always heads.
idiot.

>>727463373
You're wasting your time trying to explain it to these fucking morons.

>>727462853

Incorrect.

Before flip

HH = 0.25
HT = 0.25
TH = 0.25
TT = 0.25

At least 1 landed heads. TT only outcome no longer possible, leaving:

HH = 0.33
HT = 0.33
TH = 0.33

1/3 both coins landed heads.

>>727461981
What a good guy

>>727463373
but the thing that counts is that one of them is tails and one of them is not. it doesnt matter which one, its the same result

>>727463374
what ever excuse you need to not hurt your ego, the important thing is you listened to others and learned from it unlike these other retards.

>>727453621
So we start with 2 coins. you flip one and it lands heads. the probability that the second coin flip will land heads is 1/2 because there are only two possible results when you flip a coin, however the odds of both those coins Landing heads up is one quarter because there are four possible results. We know one of the coins will be heads we just don't know which one. You don't need to know which coin will land heads up, because just one coin has an uncertain result only that coin matters. If I have two dice and one is weighted to always come up as a five the odds of me getting two fives are one in six regardless of which dice is weighted. Since one of those coins will always be heads only one coin flip matters so it's 1/2.

>>727463504
Specially if he tries to explain the wrong answer.
Really a waste of time

>>727463072
>ITS ASKING ABOUT THE COIN THAT ISN'T HEADS!!!

kek no it isn't you retard. Both coins could be heads.

1/3

>>727463663
Nice b8 m8

In order to help the simpletons in here understand that HT =/= TH, we switch one of the coins with a penny.

It's still two coins, we didn't change the equation. But please explain how HT could be the same as TH.

Protip: You can't. The answer is 1/3

File: niggerboy.png (99KB, 641x650px) Image search: [Google]

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>>727463281

>>727463381

B = HH or HT or TH (at least 1 heads)

You're literally stupid.

1/3

>>727463568
Incorrect.

Use Binomial Theorem to see that HT and TH cannot both be a possibility.

HH = 0.5
HT or TH = 0.5

1/2 both coins landed on heads.

>>727453621
50%?

>>727463772
You're changing the question
that's why your answer is different

Nice try shill

>>727463648
I take that back the chance that both coins will be heads is 1/4. Whether not one of the coins comes up as heads doesn't change the overall chance that if you flip 2 Coins you have a 1/4 chance of getting two heads.

>>727463787

You forgot to change the other values in this shoop, retard.

Shitty b8.

According to Columbo's postulate the answer can only be 1/17

>>727463863
correct

>>727463891

>doesn't understand basic English nor mathematics
>utters shill

>>727464014
so you admit it's 1/2 glad we came to a conclusion

>>727463323

Are you actually this retarded?

Ok, I'll bite.
>What is the probability of birthing a female (HH) after already birthing a female?
1/2

Answer to OP question is 1/3.

>>727463849
still havent tested it and still arguing about it, this must be the limit of human stupidity, right?

>>727464014
i think you dont tbh

>>727463772

holy fuck anon, i see it now, how could i be so stupid

>>727460757
Op implied it was a combination, not a permutation so I'd say you're correct, but with the wrong reasoning

>>727464075
There's only two genders Male and Female

Trans are for mentally disturbed people like you so you can argue that there's 3 sides to a two sided coin

>>727464064

You literally don't understand the English language. Fucking hilarious. Illiterate AND a stupid cunt.

Go back to flippin burgers

>>727463641

What matters is that they are 2 separate outcomes and they are both equally likely.

Probability of HH = 1/3
Probability of HT = 1/3
Probability of TH = 1/3

Amazing, you might finally be understanding.

>HH
>HT
>TH
>TT

If one is automatically heads, that gets rid of option 4.
You're left with HH, HT, or TH.
1/3 chance.

>>727464081
how do you know I haven't tested it?
I got 1/2

>>727464104
its ok if its your first time seeing the problem, now join us in laughing at the retards.

>>727464226
either troll or 100% retarded, in both cases not worth talking to.

gg

>>727464221
they are not seperate outcomes tho :/

>>727453621
It's 1/3

You can get T H or H T or H H

>>727454348
Ive flipped two coins and gotten both heads or both tails many times

The chance of a coin being heads or tails is individually always 50/50, but its actually closer more likely to be one end (cant remember which) due to weight

>>727464377

they are tho :/

>>727463849
>HT and TH cannot both be a possibility.

I just flipped 2 coins (coinA and coinB)

At least 1 of them landed heads.

Is it possible that coinA is heads?

Is it possible that coinB is heads?

If you answered yes to those questions, you have contradicted yourself and shown that you are retarded.

1/3

HH = 0.33
HT or TH = 0.66

>>727464214
You literally just read that anon's english and still stake that claim.

I was part of the 1/3 liberal master race before but with this kind of stupidity I have to side with 1/2 Trump boys

>>727453621
Each coin has a 50/50 chance to be heads or tails that is not affected by other coins in any way

>>727464104
What a /b/ro

>>727464190
>so you can argue that there's 3 sides to a two sided coin

this is what this retard thinks we're doing.

Jesus Christ.

1/3

>>727455214
This is impossible. Which coin is heads is irrelevant. One coin is heads. That's all that's relevant. The other coin has a 50% chance of being heads. The answer is 50%.

>>727464483

cool. got more bait?

>>727464471
no :(

>>727461140
it isnt 3 possible events, its two possible events for each coin

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>>727464104

Welcome to the Dark Side.

1/3

>>727464621
correct

>>727464645
dont bully him, he hit his head and cant think right.

>>727464377
>they are not seperate outcomes tho :/

read this >>727461277

1/3

>>727464479
no man it's 50%

one coin is heads
if we don't get HH then the only two possibilities are HT or TH
but if we have HT we cannot have TH and vice versa
so HT and TH together are one possibility
then the other option is HH
making it a 50/50 chance of landing an HH

>>727455444
Apparently the problem is confusing the relevance of the permutation of the result of the coins. If the permutation were relevant, the answer would be 1/3. It is not relevant. Only the combination is. Thus HT and TH are the same thing.

>>727464428
except thats not whats being tested in reality
in reality, you have one coin that will be heads and another that can either be heads or tails. 1 or 2.

>>727464377
Of course they are separate outcomes... If one coin is a penny and one is a quarter, would you say that penny (heads) and quarter (tails) is the same outcome as penny (tails) and quarter (heads)? It's the same in the sense that one is heads and one is tails, but they are clearly different in the sense of which coin is heads and which is tails and since they are separate outcomes they should be treated as such

>>727464769
and what do you expect him to teach me when he's wrong?

>>727464479
IF that's your case, why isn't H工, T工, 工T

a possibility? There's a probability that it can land on its side and not be heads or tails but your completely discounting it and basing your entire answer on a different order as the sample.

The real answer is actually 1/7

>>727464690
>two possible events for each coin
yes but 4 in total for 2 coins 1 of which is excluded.

>>727464808
correct

Imagine this.

You're a jew who just arrived on the platform in Auschwitz-Birkenau. The SS-officer is OP, and the correct answer will set you free.

Will the retards in here bet their lives on 1/2?

Of course they would. It's called the Dunning-Kruger effect: Retarded people have no clue that they're retarded and overestimate their own abilities.

Also, the answer is 1/3

>>727464890
*2 of which are excluded

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>>727464459
>Ive flipped two coins and gotten both heads or both tails many times

We got ourselves a professional over here, guys.

>The chance of a coin being heads or tails is individually always 50/50

WOAH, amazing bro. We never knew.

>but its actually closer more likely to be one end (cant remember which) due to weight

Lose a few pounds then.

>>727454348

retard calls others retarded

>>727464776
Wrong. The first flip is 50/50. But you have to take in account the probability of 2 in a row. Its a .5 percent both times .5 time .5. Its a .25 percent chance.

>>727464765
oh look i'm replying myself and can't prove theories haha nice try stupid granite rock

>>727464858
1+1 = 2 1+0 = 1 0+1 = 1

>>727453621
Due to quantum mechanics, they are both head and tails at the same time

>>727464776
>if we don't get HH then the only two possibilities are HT or TH

So you've just agreed that there are 3 possibilities,
HH, HT, TH

1/3.

>>727464957
well HH is the one im talking about but what else do you exclude? them landing on the edge? if that was a possibility it would be even more confusing.

its 1/3

>>727464822
You have twice as much chance to only get one head because either coin can be heads.

1/3 chance for both to be heads.

>>727464954

funny as fuck anon

>>727464954
I think I understand now...

You and the other retards who think 1/3 are so retarded you can't realize that 1/2 is the answer thanks.

>>727453621
Possible outcomes:

HH
TT
TH
HT

TT is excluded leaving:

HT
TH
HH

Because we know at least one of them lands heads, we can combine TH and HT into one set

Possible outcomes are

{TH|HT}
HH

Therefore, 50/50

>>727465140
Schrodinger's cat was meant to demonstrate the absurdity of such a notion, you silly faggot.

>>727464890
>4 in total

No
You are flipping a coin
You will get two possible outcomes for that coin

You arent flipping something that can end 4 different ways

And where the fuck are you all getting 4 or 3 from? You have two damn coins, you know one has got to be heads, meaning you 'end result' is HH or TH no matter what
Thats also 2 possibilities

TH vs HT I know but it isn't asking for that, it's asking what the chance is you'll get two heads, whether you have TH or HT is irrelevant to that chance

>>727464954

You may not be aware of this, but people often post knowingly wrong answers on 4chan to make people like you upset.

>>727465153
>>727465158
I agree there are three possibilities i just don't agree that theyre equally likely.

I exclude one of either HT or TH because both are not possible.

>>727465034
its 25% if we include the HH result, we dont so its 1/3.

>>727464621

Either coin could be tails.

1/3

>>727465230

Nope, but you're almost there. If you acknowledge your own stupidity, you'll be set free.