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QUESTION 9 The service time for customers coming through a checkout counter has mean 50.4 seconds and standard deviation 6.8 seconds. Find the probability that

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QUESTION 9 The service time for customers coming through a checkout counter has mean 50.4 seconds and standard deviation 6.8 seconds. Find the probability that the average service time for 64 passengers to get service will fall between 48.0 and 52.8 seconds. O 0.9952 0.9976 O 0.0024 O 0.2737

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