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After taking 7 quizzes, your average is 77 out of 100. What must your average score be on the next five quizzes to increase your average to 82?

 Jan 15, 2020
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(7 *77   + 5 * x )/ (5+7)  = 82

x= 89     scores needed on next 5 exams

 
 Jan 15, 2020

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