Steele Electronics Inc. sells expensive brands of stereo equipment in several shopping malls. The marketing research department of Steele reports that 31% of the customers entering the store that indicate they are browsing will, in the end, make a purchase. Let the last 21 customers who enter the store be a sample.

a. How many of these customers would you expect to make a purchase? (Round the final answer to the nearest whole number.)

Number of Customers

b. What is the probability that exactly six of these customers make a purchase? (Round the final answer to 4 decimal places.)

Probability

c. What is the probability 11 or more make a purchase? (Round the final answer to 4 decimal places.)

Probability

d. Does it seem likely at least one will make a purchase ("likely" refers if the probability is more than 70%)?

(Click to select) No Yes