A company has machines that break down on an average of three per hour.

and the breakdowns are distributed in a Poisson manner. Downtime costs the company $27

per hour per machine. And each maintenance worker makes $15 per hour.

One worker can service machines at an average rate of five per hour distributed exponentially.

a team of two workers can do eight machines per hour, and

a team of 3 workers can do ten per hour distributed exponentially.

A. The down time cost for the optimum crew is?

A. $46.20

B. $55.50

C. $56.57

D. $32.75

E. None of these

B. What is the optimum crew size for servicing machines?

A. 1 worker

B. 2 workers

C. 3 worders

D. 0 workers

E. None of these