SOLUTION: Grace's average bowling score over the past 6 games is 150. If she wants to raise her average score by 10%, and she has two games left in the season, what must her average score on

Question 787754: Grace's average bowling score over the past 6 games is 150. If she wants to raise her average score by 10%, and she has two games left in the season, what must her average score on the last two games be?
Answer by htmentor(1343) (Show Source): You can put this solution on YOUR website!
Increasing her average score of 150 by 10% means the new average score = 1.1*150 = 165.
For the first 6 games her total is 150*6 = 900
The total for the first 6 games plus the total for the final 2 divided by 8 will equal her new average:
165 = (900 + S)8
1320 - 900 = S
S = 420
So she must average 210 for the final two games

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