SOLUTION: Maria scored 72, 97, and 82 on her first three math tests. She wants to have a mean score of 82 for the quarter. How many points does she need on her last test to earn an 82 for th

Algebra ->  Average -> SOLUTION: Maria scored 72, 97, and 82 on her first three math tests. She wants to have a mean score of 82 for the quarter. How many points does she need on her last test to earn an 82 for th      Log On


   

Question 799340: Maria scored 72, 97, and 82 on her first three math tests. She wants to have a mean score of 82 for the quarter. How many points does she need on her last test to earn an 82 for the quarter?

Answer by solver91311(24713) About Me  (Show Source):
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If she wants an average of 82 on 4 tests, then her total points on all 4 tests must equal 82 times 4. Add the first three scores and subtract that value from the product of 82 and 4. The difference is the required last test score.

John

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