the daily useage time on the apple iphone is normally distributed with mean 5.4 hours and standard deviation 1.2 hours. suppose you survey 5 of your friends who have iphones. what is the probability that the sum of their useage times is less than 30 hours? round your answer to three decimal places.

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06-10-2022
Mathematics

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the daily useage time on the apple iphone is normally distributed with mean 5.4 hours and standard deviation 1.2 hours. suppose you survey 5 of your friends who have iphones. what is the probability that the sum of their useage times is less than 30 hours? round your answer to three decimal places.

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