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Lydia earned a score of 405 on Exam A that had a mean of 450 and a standard deviation of 25. She is about to

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Lydia earned a score of 405 on Exam A that had a mean of 450 and a standard deviation of 25. She is about to take Exam B that has a mean of 600 and a standard deviation of 20. How well must Lydia score on Exam B in order to do equivalently well as she did on Exam A? Assume that scores on each exam are normally distributed

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