→ yhliu:全機率定理. 05/02 20:49
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]?
最近寫題目時看到這題，不知是不是用貝氏機率求解
可是畫樹形圖感覺又怪怪的，因此上來賜教~ 謝謝:)
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 114.42.217.180