Who smokes? Th e question “Do you smoke?” was asked of a random sample of 100 people. Results are shown in the table below. Suppose we select one of these people at random.

(a) What’s the probability that the person smokes?

(b) Given that the person is male, what’s the probability that the person smokes?

(c) Are the two events “smokes” and “is male” independent? Why or why not?

Smoke? Gender Yes No Total Male 19 41 60 Female 12 28 40 Total 31 69 100