question archive Consider a single-server queuing system that serves two types of customers (A and B) on a first-in-first-out basis, with unlimited capacity to store waiting customers
Consider a single-server queuing system that serves two types of customers (A and B) on a first-in-first-out basis, with unlimited capacity to store waiting customers
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Consider a single-server queuing system that serves two types of customers (A and B) on a first-in-first-out basis, with unlimited capacity to store waiting customers. Types A and B have independent Poisson arrival processes with average arrival rates of 2 per hour and 3 per hour, respectively. Because the two arrival streams are independent, the overall arrival process is also a Poisson process, with an average arrival rate of 5 customers per hour, and the probability that a new arrival is of type A is 2/(2+3)=0.40. Service of each type A customer takes exactly 15 minutes, and service of each type B customer takes exactly 5 minutes.
What is the expected time in system for a type A customer (including waiting and service time)?
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