2007 AMC 12B Problems/Problem 12
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Problem 12
A teacher gave a test to a class in which 
of the students are juniors and 
are seniors. The average score on the test was 
. The juniors all received the same score, and the average score of the seniors was 
. What score did each of the juniors receive on the test?
Solution
Taking a weighted average
where x is the Juniors' score
See Also
| 2007 AMC 12B (Problems • Resources) | ||
| Preceded by Problem 11 | Followed by Problem 13 | |
| 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 | ||
