1. A and B are independent events with P(B) = 0.56 and P(A | B) = 0.60, then P A is?

2. When P A = 0.40 and P B = 0.55 and P A B = 0.25, then P(A | B) is?

3. What is the probability of complement of A, where P A = 0.38?

4. P A = 0.20 and P B = 0.50 are independent events, what is the probability that they occur simultaneously?