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crystalike (New Start) 于 (Fri Sep 19 15:26:39 2008) 提到:
not sure if this is an old one.
A and B tossing a fair coin. A toss N times and B toss N+1 times. What is
the probability of B getting more heads than A.
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wangjuestam (penpen) 于 (Fri Sep 19 15:33:11 2008) 提到:
I think it's 1/2. My thoughts would be for the first N times, A and B should
have exactly the same expectation number of heads.
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