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11 November, 06:04

You score 92, 86, 98, and 94 on your first four social studies tests. What score must you get on the fifth test to have a mean score of 90?

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  1. 11 November, 06:29
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    92 + 86 + 98 + 94 = 370 / 4 = 92.5 avg. to decrease this mean to 90, we can add a score of 80. Thus, (80+370) / 5 = 90

    80
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