Patients arrive to a clinic at the rate of 30 per hour. The clinic is open for 24 hours a day. The average service time for a patient is about 45 minutes. Assume that all M/M/s assumptions apply and there are 3 doctors available in the clinic. What is the average arrival rate if the units are in minutes? 30 1.25 0.5 45 0.1389 0.8333