1) Choose a random # between 0 and 1.
2) Choose another random # between 0 and 1.
3) What's the average difference between the two numbers?
Domain could be rational or irrational.. I don't think it matters.
bump
>>8568013
The average difference is 0 obv.
1/3
http://www.wolframalpha.com/input/?i=integrate+%7Cx-y%7C+dxdy+from+x%3D0+to+1+and+y%3D0+to+1
>>8568039
also http://math.stackexchange.com/questions/195245/average-distance-between-random-points-on-a-line
>>8568039
Difference not distance
>>8568136
then 0 obviously since for every x-y you have a y-x