Question

Customers arrivals at a checkout counter in a department store per hour have a Poisson distribution with parameter λ = 7.

Calculate the probabilities for the following events.

(a) (2 points) Exactly seven customers arrive in a random 1-hour period.

(b) (4 points) No more than two customers arrive in a random 1-hour period.

(c) (4 points) At least three customers arrive in a random 1-hour period.

Answer 1

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2. C Nouo we need, to-find out-the at least three Customers 구 3 3 1