2007 AMC 12B Problems/Problem 2
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- The following problem is from both the 2007 AMC 12B #2 and 2007 AMC 10B #3, so both problems redirect to this page.
Contents
[hide]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?
Solution 1
The trip was miles long and took gallons. Therefore, the average mileage was
Solution 2
Alternatively, we can use the harmonic mean to get
See Also
2007 AMC 12B (Problems • Answer Key • Resources) | |
Preceded by Problem 1 |
Followed by Problem 3 |
1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25 | |
All AMC 12 Problems and Solutions |
2007 AMC 10B (Problems • Answer Key • Resources) | ||
Preceded by Problem 2 |
Followed by Problem 4 | |
1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25 | ||
All AMC 10 Problems and Solutions |
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