Question: Management a dry cleaning firm has 12 employees; 7 women and 5 men. Three of the women and five of the men are 40 years old or older. The remainder are over 20 years of age and under 40. If a person is chosen at random from this firm, what is the probability that the person is
(a) a woman?
(b) under 40 years of age?
(c) 20 years old?