Mr. McGee is the manager of the washer and dryer department of an appliance store. He wants to estimate the probability that a customer who comes to his department will buy a washer or dryer. He collected the following data during one week: 177 customers came to his department, 88 purchased washers, 64 purchased dryers, and 69 did not make a purchase.
a) Using Mr. McGee’s data, what is the probability that the next customer who comes to his department will purchase a washer or a dryer?
b) What is the probability that if a customer bought a washer, he or she also bought a dryer?