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What is the approximate probability that the average

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Reference no: EM132522233

Suppose that the average waiting time at a banking service is 10 minutes.

A customer waited for 10 minutes, find the probability that he will be still waiting after 30 minutes.

What is the approximate probability that the average waiting time of the next 25 customers is at most 12 minutes?

Reference no: EM132522233

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