Question

The owner of a small deli is trying to decide whether to discontinue selling magazines. He suspects that only 8.5% of his customers buy a magazine and he thinks that he might be able to use the display space to sell something more profitable. Before making a final decision, he decides that for one day he will keep track of the number of customers that buy a magazine. (a) Explain why this is a binomial experiment. (b) Assuming his suspicion that 8.5% of his customers buy a magazine is correct, what is the probability that exactly 5 out of the first 13 customers buy a magazine? . (c) What is the expected number of customers from this sample that will buy a magazine?

Answer 1