Question: You may need to use the appropriate appendix table or technology to answer this question. Cars arrive at a car wash randomly and independently; the

You may need to use the appropriate appendix table or technology to answer this question.

Cars arrive at a car wash randomly and independently; the probability of an arrival is the same for any two time intervals of equal length. The mean arrival rate is 15 cars per hour. What is the probability that 20 or more cars will arrive during any given hour of operation?

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