SOLUTION: After taking 3 quizzes, your average is 79 out of 100. What must your average score be on the next five quizzes to increase your average to 84?

SOLUTION: After taking 3 quizzes, your average is 79 out of 100. What must your average score be on the next five quizzes to increase your average to 84?

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Question 297439: After taking 3 quizzes, your average is 79 out of 100. What must your average score be on the next five quizzes to increase your average to 84?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = the sum of the first 3 quiz scores
given:

Let = the sum of the last 5 quiz scores

The average score of the last 5 quizes is 87%

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