Question

已知P(A)=0.3,P(B)=0.5,P(AB)=0.15,验证P(B┃A)=P(B),P(B┃A￣）=P(B),P(

Answer 1

(1)P(B|A)=P(AB)/P(A)=0.15/0.3=0.5=P(B)(2)P(BA~)=P(B)*(1-P(AB)/P(B))=0.35,P(B|A~)=P(B|A~)/P(A~)=0.35/(1-0.3)=0.5=P(B)剩余两个是类似的P(AB)代指AB同时发生的概率（A发生是未知条件,计算时也许考虑）P(B|A)代...