SOLUTION: Alex received scores of 82 and 88 on his first two quizzes. What average score does he need on the next two quizzes to achieve a final average score of 90, if all four scores are
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Question 335272: Alex received scores of 82 and 88 on his first two quizzes. What average score does he need on the next two quizzes to achieve a final average score of 90, if all four scores are weighted equally? Found 2 solutions by Fombitz, CharlesG2:Answer by Fombitz(32388) (Show Source):
You can put this solution on YOUR website! Alex received scores of 82 and 88 on his first two quizzes. What average score does he need on the next two quizzes to achieve a final average score of 90, if all four scores are weighted equally?
(82 + 88 + x + y)/4 = 90, x & y are the scores on the next 2 quizzes
(170 + x + y)/4 = 90
170 + x + y = 360 (multiplied both sides by 4)
x + y = 190 --> total score of 190 on the next 2 quizzes
190/2 = 95
He needs 95 on next 2 quizzes.
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