作者celestialgod (攸藍)
看板Statistics
標題[問題] 硬幣問題
時間Wed Jan 26 14:02:47 2011
A coin, having probability p of landing heads, is continually flipped until
at least two head and one tail have been flipped. Find the expected number od
flips needed.
請版上大大幫忙解題 謝謝><
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