Problem:
Josanna's test scores to date are , and 85 . Her goal is to raise her test average at least 3 points with her next test. What is the minimum test score she would need to accomplish this goal?
Answer Choices:
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B.
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E.
Solution:
The sum of her first 5 test scores is 385 , yielding an average of 77. To raise her average to 80 , her test score must be the difference between and 385 , which is .
The problems on this page are the property of the MAA's American Mathematics Competitions