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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