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14 October, 05:45

John scored 75, 82, 66, and 78 on his history tests. What score must John get on his next test in order to have a mean score of 76?

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  1. 14 October, 06:08
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    [75 + 82 + 66 + 78 + x ] / 5 = 76

    301 + x = 380

    x = 79
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