Question

3) Customers arrive at one mobile phone service center (with only one technician) accordingto a Poisson process with a mean inter-arrival time of 20 minutes. Customers spend on an average of 15 minutes in the service area.
i.What s the probability that a new arrival need not wait for the technician tobe free?
ii.What is the expected no. of customers in the service center?
iii.How much time can a customer expect to wait for his turn?
iv.How much time can a customer expect to spend in the shop?

Answer 1

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