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