Mathematics, 01.02.2021 21:20 alcott1110

C 17. At high school A, the mean score of 50 students on a science test is 75. At high school B, the mean score of 40 students on the same test is 80.
What is the mean score of the 90 students?

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C 17. At high school A, the mean score of 50 students on a science test is 75. At high school B, th...