4.单选题-|||-已知事件A、B满足: (AB)=P(overline (A)overline (B)) ,且 P(A)=-|||-p,则 P(B)= ()()-|||-A p-|||-B -p-|||-C .(1-P)-|||-D 1

由无条件式：$P(AB)=P(A)P(B)$；$P(\overline {A}\overline {B})=P(\overline {A\cup B})=1-P(A\cup B)$=1-P(A)-P(B)+P(AB)$=1-P(A)-P(B)+P(A)P(B)$
所以 $P(B)=1-P(A)$
B