A Dental Clinic at Which Only One Dentist Works Is

A dental clinic at which only one dentist works is open only two days per week. During those two days, patients arrive at the rate of four per hour. The doctor serves patients at the rate of one every 12 minutes.
(a) What is the probability that the clinic is empty (except for the dentist and staff)?
(b) What percentage of the time is the dentist busy?
(c) What is the average number of patients in the waiting room?
(d) What is the average time a patient spends in the office (wait plus service)?
(e) What is the average time a patient waits for service?

Correct Answer:

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(a) P_o = 1 - 4/5 = 0.20
(b) The dentist i...

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