1.
If AA and BB are two events such that P(A)=0.7P(A) = 0.7, P(B)=0.4P(B) = 0.4 and P(AB)=0.5P(A \cap \overline{B}) = 0.5, where B\overline{B} denotes the complement of BB, then P(B(AB))P(B \mid (A \cup \overline{B})) is equal to: