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In a psychology class, 59 students have a mean score of 90.9 on a test. Then 8 more students take the test and their mean

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In a psychology class, 59 students have a mean score of 90.9 on a test. Then 8 more students take the test and their mean score is 66. What is the mean score of all of these students together? Round to one decimal place. mean of the scores of all the students =

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