The Quick Snap Photo Machine at the Lemon County Bus

question 20

Essay

The Quick Snap photo machine at the Lemon County bus station takes four snapshots in exactly 75 seconds.Customers arrive at the machine according to a Poisson distribution at the mean rate of 20 per hour.On the basis of this information,determine
a.the average number of customers waiting to use the photo machine.
b.the average time a customer spends using the system.
c.the probability an arriving customer must wait for service.
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