Probability
2012-10-07 1:39 am
P(A) = 0.305, P(B) = 0.29, P(A|B) = 0.328, P(A) x P(B) = 0.305 x 0.29 = 0.08845. Find P(A or B)?
回答 (1)
2012-10-07 2:14 am
✔ 最佳答案
P(A) = 0.305P(B) = 0.29
P(A|B) = 0.328
P(A and B) / P(B) = 0.328
P(A and B) / 0.29 = 0.328
P(A and B) = 0.09512
P(A or B)
= P(A) + P(B) - P(A and B)
= 0.305 + 0.29 - 0.09512
= 0.49988
2012-10-07 15:10:21 補充：
When A and B are independent, P(A and B) = P(A) x P(B)
When A and B are dependent, P(A and B) ≠ P(A) x P(B)
參考: micatkie, micatkie
收錄日期: 2021-04-13 19:01:32
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20121006000051KK00478