Arrivals to a bank ATM machine are distributed according to a Poisson distribution with a mean equal


Question: Arrivals to a bank ATM machine are distributed according to a Poisson distribution with a mean equal to three per 15 minutes.

a. Determine the probability that in a given 15 minute segment no customers will arrive at the ATM machine.

b. What is the probability that fewer than four customers will arrive in a 30-minute segment?

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Answer: The answer consists of 1 page
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