If the average number of arrivals is four per minute and

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Customers enter the waiting line to pay for food as they leave 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 proportion of the time is the server busy?

a) 0.43

b) 0.57

c) 0.75

d) 0.25

e) 0.33

Reference no: EM13460841

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