Question

Jobs arrival at a workstation in a manufacturing plant is in a Poisson fashion at an

average rate of five per hour. The time to machine one job is an exponential distribution with

a mean time of 20 minutes.

a)What is the expected time a job has to wait at the workstation?

b) What will be the average number of jobs waiting at the workstation at any time?

c)What is the probability that there will be four jobs at the work station?

d) what is the probability that at any time workstation is idle?​

Answer 1

Answer:

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