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Customers arrive at a bank according to a Poisson process having a rate of 2.42 customers...

Customers arrive at a bank according to a Poisson process having a rate of 2.42 customers per hour. Suppose we begin observing the bank at some point in time.

What is the probability that 3 customers arrive in the first 1.8 hours?

Customers arrive at a bank according to a Poisson process having a rate of 2.3 customers per hour. Suppose we begin observing the bank at some point in time.

What is the expected value of the number of customers that arrive in the first 1.3 hours?

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