Probability I: Introductory Ideas

Two events, A and B, are statistically dependent. If P(A)=0.39, P(B)=0.21, and P(A or B)=0.47, find the probability that

1. Neither A nor B will occur.
2. Both A and B will occur.
3. B will occur, given that A has occurred.
4. A will occur, given that B has occurred

Solution