Question: This questions is related to M/M/1 model assumptions (Queueing Model). There are 21 employees working in a restaurant. The food boxes has an average arrival

This questions is related to M/M/1 model assumptions (Queueing Model).

There are 21 employees working in a restaurant. The food boxes has an average arrival rate of 1000 boxes/hour.

12 seconds is the average time a box spends in the system.

What is the probability that 7 boxes are in the system?

Please clearly state the calculation method.

Thank you in advance.

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