a seller will give 10% off coupon for 5 randomly chosen customers among her next 20 customers. what is the probability that the second customer receive a coupon? answer the following steps.

a. how many ways are there to choose 5 among the next 20 customers?

b. how many ways are there to choose 5 customers among the next 20 customers such that second customer is included?

c. what is the probability that the second customer will receive a coupon?