- #1

mathmari

Gold Member

MHB

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The average time of customer service at the cash registers of a department store is $30$ people per hour. If a new customer arrives at the checkout, then calculate the probabilities:

a) to be served in less than 15 minutes

b) to need to be served from 6 to 8 minutes

a) Do we have Poisson disrtibution with $\lambda=30$ ?

But then we consider "minutes" instead of "number of customers".

Could you give me a hint ?

:unsure: