SOLUTION: After taking 7 quizzes, your average is 72 of 100. What must your average be on the next five quizzes to increase your average to 77?

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Question 494485: After taking 7 quizzes, your average is 72 of 100. What must your average be on the next five quizzes to increase your average to 77?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
After taking 7 quizzes, your average is 72 of 100. What must your average be on the next five quizzes to increase your average to 77?
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7*72 = 504
12*77 = 924
You need 420 points on the next 5.
420/5 = 84 average for the 5