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any help please.. At Denver International Airports, 87% of recent flights have arrived on time. A sample of 11 flights is studied. Round the probabilities

any help please..

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At Denver International Airports, 87% of recent flights have arrived on time. A sample of 11 flights is studied. Round the probabilities to 4 decimal places. a) Find the probability that all 11 of the flights were on time. b) Find the probability that exactly 9 of the flights were on time. c) Find the probability that 9 or more of the flights were on time

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