SOLUTION: If a student has an average of 80% on 5 quizzes, what must his scores be on the next 2 quizzes to raise his average to 83%?

Question 950945: If a student has an average of 80% on 5 quizzes, what must his scores be on the next 2 quizzes to raise his average to 83%?
Answer by macston(5194) (Show Source): You can put this solution on YOUR website!
To average 83% on seven quizzes, the sum of the scores must be 7(83)=581.
The sum of the first five quizzes is 5(80)=400 so the student needs to score 581-400=181 on the next two quizzes combined to average 83%.
ANSWER The student must score a total of 181 on the next two quizzes combined to average 83% overall.
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