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In the past, schools in Los Angeles County has closed an average of three days each year for weather emergencies

In the past, schools in Los Angeles County has closed an average of three days each year for weather emergencies. What is the probability that schools in Los Angeles County will close for four-days next year
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): In the past, schools in Los Angeles County has closed an average of three days each year for weather emergencies. What is the probability that schools in Los Angeles County will close for four-days next year ----------------- average = 3 per year poissonpdf(3,4) = 0.16803... Cheers, Stan H.
answered by: yoyoma
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