問題詳情

25. In country B, men's longevity are investigated and the following results are found: 1. Probabilitythat a man lives at least 70 years is 77%； 2. Probability that a man lives at least 80 years is48%. What is the conditional probability that a man's age is at least 80 years old given that hebas just celebrated his 70th birthday?
(A)


(B)0.48；
(C)0.77；
(D)1；
(E)None of the above is correct.e, a and c.

參考答案

答案：[無官方正解]
難度：計算中-1
書單：沒有書單，新增