The marketing director of a department store interviewed 50 customers who had bought appliances the previous week. They found that 20% of the customers bought a washing machine and 40% bought a dishwasher. Also 48% of the customers bought an appliance other than a washing machine or dishwasher.

Question

What is the probability that a surveyed customer selected at random bought both a washing machine and a dishwasher?

b. Of the 50 customers surveyed, how many were likely to have bought both a a washing machine and a dishwasher?

The question is confusing. If 20% bought washing machines and 40% bought dishwashers does it mean 40% bought both? How does 48% of the customer who bought neither washing machine nor dishwasher play a role in the problem?

Answer 1

boo boo