已知事件A与B相互独立,并且P(A)=0.4P(B)=0.3,则P(AYB)=?
问题描述:
已知事件A与B相互独立,并且P(A)=0.4P(B)=0.3,则P(AYB)=?
答
P(A∪B)= 1-(1-P(A))(1-P(B)) = 1-0.6*0.7 = 0.58
已知事件A与B相互独立,并且P(A)=0.4P(B)=0.3,则P(AYB)=?
P(A∪B)= 1-(1-P(A))(1-P(B)) = 1-0.6*0.7 = 0.58