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原帖由 多功能中場 於 2009-6-22 04:51 PM 發表
what else do you like?
IQ question
There is a 1 meter long rod
Like when 500 ants scattered randomly ( with uniform distribution ) on a rod
Each ant is given the same constant speed(1 meter per min) but random directino ( left or right)
They will move at that velocity and when they meet another ant on the way, they will turn back and keep moving with teh same speed
So now, on average, when will all ants leave the rod?