Customers Enter the Waiting Line at a Cafeteria on a First-Come

question 71

Multiple Choice

Customers enter the waiting line at a cafeteria on a first-come, first-served basis.The arrival rate follows a Poisson distribution, while service times follow an exponential distribution.If the average number of arrivals is four per minute and the average service rate of a single server is seven per minute, what is the average number of customers in the system?

• A)0.43
• B)1.67
• C)0.57
• D)1.33

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