Hey everyone!

2 Questions:

1) Let A and B be two events. Suppose that P(A), P(B) and P(AB) are given. What is the probability that neither A nor B will occur?

I know the ANSWER is 1 - P(A) - P(B) + P(AB) but I'm not sure how to get it.

2) In a bridge game, each of the four players gets 13 random cards. What is the probability that every player has an ace?

I don't have the answer for this one, but am confused nonetheless on how to solve it.

Any input would be greatly appreciated.