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12 September, 12:32

Adrian's mean score for four tests is 64%. He wants to increase his mean to 68% after the fifth test. What does he need to score in the fifth test?

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  1. 12 September, 14:49
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    He has to score 84 %

    Step-by-step explanation:

    64 + 64 + 64 + 64 = 256

    5*68 = 340

    340 - 256 = 84

    (64 + 64 + 64 + 64 + 84) / 5 = 68
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