SOLUTION: The average SAT score of eleven students was 2,ooo. When Mary's score was added to the other eleven scores, the average went up to 2,010. What is the positive difference between h
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Question 565627: The average SAT score of eleven students was 2,ooo. When Mary's score was added to the other eleven scores, the average went up to 2,010. What is the positive difference between her score and the initial average score?
Answer by ad_alta(240) (Show Source): You can put this solution on YOUR website!
Let 'M' be Mary's score. Then (2000*11+M)/(12)=2010. Thus M=2120. The difference is 120.
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