Question

Customers arrive at coffee shop at a rate of 40 per hour. There are 2 servers available and it takes an average of 1 minute to serve each customer.


Using Table 12-6, what is the probability of no customers in the system?

		0.333
		0.5
		0.667
		0

Answer 1

Answer: 0.667

Customer arrival rate = = 40/60 = 0.66667 customer per minute.

Service rate = = 1 minute = 60 customer per hour or 1 customer per minute.

Since 2 servers available = 2*1 = 2 customer per minute.

Probability of no customer in the system =

Probability of no customer in the system = 1-(0.66667/2) = 0.667

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