An average of two people per minute arrive at the check-out counter of a grocery store....

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An average of two people per minute arrive at the check-out counter of a grocery store....

An average of two people per minute arrive at the check-out counter of a grocery store. What is the probability that exactly one will arrive in a given minute?

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Answer 1

Answer #1

µ = 2 per minute

This is a poisson distribution.

P(X = x) = e^-µ * µ^x / x!

P(X = 1) = e^-2 * 2¹ / 1! = 0.2707

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Answer 2

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