Problem:
A college student drove his compact car miles home for the weekend and averaged miles per gallon. On the return trip the student drove his parents' SUV and averaged only miles per gallon. What was the average gas mileage, in miles per gallon, for the round trip?
Answer Choices:
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Solution:
The student used gallons on the trip home and gallons on the trip back to school. So the average gas mileage for the round trip was
The problems on this page are the property of the MAA's American Mathematics Competitions