What is the probability that the barber will be idle?
A hair cutting saloon has a single barber who can serve a customer in an average of 20 minutes. Customers arrive in the saloon at an average rate of two per hour for getting a haircut this service. a. How long will a customer expect to wait before being served? b. On the average how many customers will be waiting? c. What is the probability that the barber will be idle?
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