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Gabrielle wants to keep 87% average in her biology class. She earned 98%. 84%, and 90% on her previous tests. What score does she need to keep her current average in the class?
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Gabrielle wants to keep 87% average in her biology class. She earned 98%. 84%, and 90% on her previous tests. What score does she need to keep her current average in the class?

User Nhinkle
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1 Answer

4 votes
(98 + 84 + 90 + x) / 4 = 87

87 * 4 = 348

348 - 98 = 250 - 84 = 166 - 90 = 76

She needs a 76%

Double check with (98 + 84 + 90 + 76) / 4 = 87
User Todor
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