Question 622969
after taking  4 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.
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82 = (4*77 + 5*Avg5)/(4 + 5)
(308 + 5*Avg5)/9 = 82
308 + 5Avg5 = 738
5Avg5 = 430
Avg5 = 86