作者swedrf0112 (Ｍ＊)
看板Statistics
标题[问题] 机率问题
时间Mon May 2 20:37:16 2011
Two look-alike biased coins A & B.
A comes up heads with probability 2/3.
B comes up heads with probability 1/3.
(a) If randomly pick a coin and flip it,
make a guess that the selected coin is A if the flip is a head
and B otherwise. Find the probability that the guess is correct.
(b) If randomly pick a coin and flip it, then flip the other coin also.
Use Hi & Ti to denote the result of flip i. What is P[H1T2]?
最近写题目时看到这题，不知是不是用贝氏机率求解
可是画树形图感觉又怪怪的，因此上来赐教~ 谢谢:)
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1F：→ yhliu:全机率定理. 05/02 20:49