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Mathematics, 14.01.2020 04:31 josephvaldez518
Some nations require their students to pass an exam before earning their primary school degrees or diplomas. a certain nation gives students an exam whose scores are normally distributed with a mean of 41 points and a standard deviation of 9 points. suppose we select 2 of these testers at random, and define the random variable d as the difference between their scores. we can assume that their scores are independent. find the probability that their scores differ by more than 15 points.
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