设A、B为两个随机事件,0

P（A｜B（逆））=P(A｜B^(-1))=P(AB^(-1))/P(B^(-1))P（A｜B）=P(A｜B)=P(AB)/P(B)由于P（A｜B（逆））=P（A｜B）,故有P(AB^(-1))/P(B^(-1))=P(AB)/P(B)P(B)P(AB^(-1))=P(B^(-1))P(AB)=(1-P(B))P(AB)整理得：P(B)(P(...