15 Assume that the number of customers who arrive at a water

15. Assume that the number of customers who arrive at a water ice stand follows the Poisson distribution with an average rate of 6.4 per 30 minutes. What is the probability that more than one customer will arrive during the next 30 minutes?

Solution

For 30 minutes average = 6.4

the probability that more than one customer will arrive during the next 30 minutes

= P(X>1)

=0.9877