Question
Customers arrive at a department store checkout counter according to a Poisson distribution with a mean of 7 per hour. In a given two-hour period, what is the probability that 20 or more customers will arrive at the counter?
Step 1
The mean number of customers arriving per hour is 7. Therefore, in a two-hour period, the mean number of customers arriving is 2*7 = 14. Show more…
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