1. If A and B independent events and if P (A) = .45, P(B) = .5 and P (A B) = .5 and P (A B) = .7, determine P(B A).

2. An urn contains 8 white, 5 red and 3 blue chips. A person selects 4 chips without replacement. Determine the following probabilities: (Leave answers in fraction form and do not multiply out any fractions.)

a) P(Exactly 2 chips are white)

b) P(The third chip is red)

4. Determine the value of 6/3

5. Two events, A and B, are such that P(A) = .45, P(B) = .65, and P(A B) = .25, determine P (B A

6. Two cards are drawn from a standard deck of cards. Determine the probability that the first card is a Heart and the second card is an Ace.