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A busy restaurant determined that between 6:30 P.M. and 9:00 P.M. on Friday nights, the arrivals of customers are Poisson distributed with an average arrival rate of 4.32 per minute.

What is the probability that at least 1 minute will elapse between arrivals?
Round answer to 4 decimal places.

I know lambda is 4.32 so then do I just plug in 0 for x, get that solution and subtract that from 1.0?

You are correct! Plug in 0 for x and subtract from 1.

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