If $P(A) = 0.8$ and $P(A \cap B) = 0.25$, find $P(A - B)$.
For two independent events AAA and BBB, P(A)=0.5P(A) = 0.5P(A)=0.5 and P(B)=0.7P(B) = 0.7P(B)=0.7. Find P(A′∩B′)P(A' \cap B')P(A′∩B′).