Question: Consider a single-server service system with average customer arrival rate of customers/minute and average service rate of customers/minute. Assume that both the interarrival times and

Consider a single-server service system with average customer arrival rate of customers/minute and average service rate of customers/minute. Assume that both the interarrival times and the service times are exponentially distributed. The average total time a customer spends in the system (in minutes) is given by which of the following expressions?

a.- 1/*/-

b.-/-

c.- 1/

d.- 1/-

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