设 A、B 为随机事件，/>(A)=0.7, P(A-B) =0.3,则 P(X5)=( )。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='25280' and id < 2138936 and id<>'2138936' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25280' and id > 2138936 and id<>'2138936' order by id asc limit 5