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dat (dat) 于 (Sat Jun 16 00:03:15 2007) 提到:
Given a fair coin, what is the expected number of throws needed to find the
first HH? and why?
Any hint?
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Nets (网) 于 (Sat Jun 16 00:12:06 2007) 提到:
n1 = 1+1/2(n1+n2)
n2 = 1+1/2(n1+0)
n1 is the number needed if previous no H, n2 is the previous is H, n1 is
answer
the
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dat (dat) 于 (Sat Jun 16 00:38:16 2007) 提到:
The answer i |
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