回复：你该复习一下概率课程了，都还给老师了，嗬嗬！

Not really.  Just like your answer, It depends on how to use A and B.  If randomly pick A or B, it is 65%, no question about it.  But if not random pick, than my answer is valid.

所有跟帖： 

• A and B agree的概率怎么会是88%？ 这两法重叠(agree)的部分只有42% -万枫- ♂ (213 bytes) () 11/07/2010 postreply 09:25:47

• The probablity of A and B agree is 0.6*0.7 + 0.3*0.4 = .54 (54%) -planotx- ♂ (64 bytes) () 11/07/2010 postreply 10:14:45

• I need to correct that if A and B agree, the correct chance is 7 -planotx- ♂ (0 bytes) () 11/07/2010 postreply 10:21:01

• 那也不会是８８％呀 -万枫- ♂ (0 bytes) () 11/07/2010 postreply 11:58:52

• yes, you are right. My post was cut -planotx- ♂ (167 bytes) () 11/07/2010 postreply 14:31:55

• 注意：准确率不是一致率，１２％是两法都错误的概率，不应该加到准确率里 -万枫- ♂ (0 bytes) () 11/07/2010 postreply 12:01:36