李同学2019-02-05 22:53:09

There are two funds: A and B. P(A gain | B gain) = 0.4, P(B gain | A gain) = 0.35, P(A gain and B gain) = 0.14. The probability of at least one of the two funds gain is closest to: A 0.46 B 0.59 C 0.61 查看解析 上一题 下一题 正确答案C 您的答案C本题平均正确率：82% Calculation rules for probabilities难度：容易 推荐：      答案解析 P(A)=P(AB) / P(B | A) = 0.14 / 0.35 = 0.40, P(B)=P(AB) / P(A | B) = 0.14 / 0.4 = 0.35, P(A or B)=P(A)+P(B)-P(AB)=0.40+0.35-0.14=0.61. 请问：我直接用P(B | A)+P(A | B)-P(AB)也是0.61，是巧合吗？