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Please use QM for Windows to solve the problem given below.
A multiple-server queuing system with an infinite calling population and a first-come, first-served queue discipline has the following arrival and service rates:
λ= the arrival rate = 50 customers per hour
µ = the service rate = 20 customers per hour
c = number of servers = 3
5. a. Determine the probability that there will be no waiting time for a customer.
b. Determine the probability that there will be 2 customers in the system.
c. Determine the probability that there will be less than or equal to 4 customers in the system.
Evaluate the case and propose a solution. Prioritise the steps to be taken in your approach, be systematic and motivate your assertions.
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