Question

Customers arrive at a single self-serve coffee machine in a busy mall at the rate of

2O per hour, following Poisson distribution. Each customer takes exactly 1OT seconds

to get his or her coffee. What is the expected number of customers in queue at this coffee machine?
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Answer 1

Explanation:

Customers come 20after every hour

The coffee machine takes 10seconds to serve one coffee.

Then there must be no que because 10×20is 200seconds and we have plenty of time to get to a hour 200seconds is 2.33minutes only