B*********h
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littletshirt (小仙鹤) 于 (Thu Jan 25 17:44:03 2007) 提到:
ZT:
There are N balls. Out of the N balls, there are M black balls and N-M white
balls. Permutate all balls in a round circle. What is the probability that
at least X black balls are in a row (e.g., WWBBBBBWWWWBWBW....)?
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exon (Exon! : )) 于 (Fri Jan 26 15:40:15 2007) 提到:
it is too difficult for me... :(
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exon (Exon! |
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