事件A、B、設P(A) =D 0.4、P(B) = 0.3與P(B|A) = 0.5 請求出
a. P(A|B)
b. P(AU B)
統計學達人指導~謝謝?
2020-10-15 9:56 am
回答 (1)
2020-10-15 10:36 am
✔ 最佳答案
P(A) = 0.4, P(B|A) = 0.5故
P(AB) = 0.4 × 0.5 = 0.2
P(A|B) = P(AB)/P(B) = 0.2/0.8 = 0.25
P(A∪B) = P(A) + P(B) - P(AB) = 0.4 + 0.3 - 0.2 = 0.5
收錄日期: 2021-05-04 02:30:37
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20201015015628AA1ba11