Any mathfags here? So last night I rolled the two dice three

^^ Also it turns out I can't string sentences together correctly

Bump4mathfags

Better question for /sci/

>>723131920
google permutations and combinations yeh dem kunt

>>723132782
Yeah I just posted there too.

Haven't been on /b/ in forever. There used to be some smart cookies here. Not sure about anymore

>>723131920
6 sided die?

What's the language rule that says to say maths and mathfags? Why isn't it mathsfags? Genuinely curious. Here, we just say math in both cases.

>>723132987
Six sided yeah

It depends on the number you picked. Look up odds for craps. 7 is the most likely number to hit. 12 and 2 are the least likely.

>>723133071

Yeah well that's the context it came up in. We were playing catan which I was saying was basically cashless craps.

Saying how the probability me rolling 7 is high, I then rolled a 7. Then next best bet is say 6 which is almost as likely to come up. I rolled the die and 6 came up. Then I was like, next most likely is 5, I rolled the fir and 5 came up.

I was amazed by my own awesomeness. I just wanted the math to back up my claim to awesome.

File: craps-7.gif (17KB, 400x432px) Image search: [Google]

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6 ways to roll a 7
5 ways to roll a 6 or 8
4 ways to roll 5 or 9
3 ways to roll a 4 or 10
2 ways to roll a 3 or 11
1 way to roll a 2 or 12

>>723133071
You're are a fucking fool.

>>723131920
Well you're looking for a statistician not a "maths guy" ...

>>723133295
based on those numbers, your odds were 15/43. Not really that impressive

>>723133851
Gtfo

>>723133905
you essentially had a 34 percent chance of guessing that correctly.

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http://stattrek.com/online-calculator/hypergeometric.aspx

This is a hypergeometric calculator. Good times.

36 different possible number combinations for each role with 2 6-sided dice. The probably of rolling a 7, then 6, then 5 is (6/36), (5/36), (4/36). Each successive guess is multiplied to find the probability of calling all 3 numbers correctly, therefore you the likelihood is 0.00257 to 1

>>723134088

Well that seems sufficiently unimpressive

wait my math was wrong.

15/63

essentially 1 in 4 chance

>>723134294

That sounds a lot more impressive!

So does that translate to like 1 in 50 000 chance?

>>723134294
No there arent. You can only roll 2,3,4,5,6,7,8,9,10,11,12.

There are only 11 possible number combinations.

>>723134385

I think your math is very very wrong

>>723134525
first roll 6/21 chance of guessing correctly
second roll 5/21 chance of guessing correctly
third roll 4 in 21 chance of guessing correctly

>>723134831

But the chances of guessing all three correctly in succession?

>>723134518
He asked the statistical probability, not the odds of each number. They're different.

>>723134294
I'm a math major. What you're asking for is called the theoretical probability of dependent events. Each correct call requires the prior call to be correct. Additionally, as it's probability and not just the summation of odds, the answer is 0.257% chance of guessing the three correctly in sequential order.