Question: A dental clinic at which only one dentist works is open only two days a week. During those two days, the patient traffic is uniformly busy with patients arriving at the rate of three per hour. The doctor serves patients at the rate of one every 15 minutes.

a) What is the probability that the clinic is empty of patients?

b) What percentage of the time is the dentist busy?

c) What is the average number of patients waiting in the office?

d) What is the average time a patient spends in the office?

e) What is the average time a patient waits for service?