The management of a firm wishes to survey the opinions of its workers, classified as follows for the purpose of an interview: 30% have worked for the company 5 or more years, 28% are female, 65% contribute to a voluntary retirement plan, and 50% of the female workers contribute to the retirement plan.

Find each probability if a worker is selected at random.

(a) A male worker is selected.

(b) A worker is selected who has worked for the company less than 5 yr.

(c) A worker is selected who contributes to the retirement plan or is female.