1.
If P(A)=23P(A) = \frac{2}{3}, P(B)=25P(B) = \frac{2}{5} and P(A∪B)−P(A∩B)=25P(A \cup B) - P(A \cap B) = \frac{2}{5}, then what is P(A∩B)P(A \cap B) equal to?