SOLUTION: Sean took 4 quizzes and has an average of 85%. He wants to raise his average to a 92%. What does he need to score on his next quiz to earn his desired average grade?

Algebra ->  Percentages: Solvers, Trainers, Word Problems and pie charts -> SOLUTION: Sean took 4 quizzes and has an average of 85%. He wants to raise his average to a 92%. What does he need to score on his next quiz to earn his desired average grade?      Log On


   

Question 1015764: Sean took 4 quizzes and has an average of 85%. He wants to raise his average to a 92%. What does he need to score on his next quiz to earn his desired average grade?
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
Average=total/n
His average, 85 is total/4
Total to date is 4*85, or 340.
Total for 5 quizzes must be 5*92=460.
He needs a 120 on his fifth quiz to increase his points to 460 and average of 92.
If 100 is the maximum, he can't do it. The best he can do is 440 or 88%.