Question

概率统计题!急A detailed analysis of your credit-worthiness shows t

Answer 1

P(A)=0.3

P(B)=0.5

P(A and B)=0.5

P(at least one)=P(A or B)=P(A)+P(B)-P(A and B)=0.3

但是这道题题目貌似出错了.因为P(B)=P(A and B)