SOLVED PROBLEMS
Problem 9.1 [Case of Sales Counter]
Customers arrive at a sales counter manned by a single person according to a poisson process with a mean rate of 20 per hour. The time required to serve a customer has an exponential distribution with a mean of 100 seconds. Find the average waiting time of a customer.
Solution
Arrival rate = λ = 20 customers per hour
Service rate = μ = 
= 36 customers per hour
The average waiting time of a customer in the queue 
The average waiting time of a customer in the system
Problem 9.2 [Case ...
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