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OpenStudy (anonymous):
Paul earned scores of 76, 78, and 86 on his first three science tests. What score does he need on his fourth test to earn a mean score of 82? A 78 B 80 C 84 D 88
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OpenStudy (anonymous):
(76+78+86+x)/4 = 82 Solve for X and you get D, or 88
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