回複：回複：回複：回複：回複：Answer to question 3

來源: 於 2010-01-29 17:52:46 [舊帖] [給我悄悄話] 本文已被閱讀：次

Sorry,you are great, you talk about question 10, you're right.let me do it again,
P(rb)=.15*.8+.85*.2=.29
P(b/rb)=.12/.29=.4137931
I'm very sorry, thinking you were 北鷹.