2015 AMC 12A Problem 3
Below is the professionally curated solution for Problem 3 of the 2015 AMC 12A, from LIVE by Po-Shen Loh. You can also try the full timed exam, view all 2015 AMC 12A solutions, or check the answer key.
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Difficulty rating: 1130
3.
Mr. Patrick teaches math to students. He was grading tests and found that when he graded everyone's test except Payton's, the average grade for the class was After he graded Payton's test, the class average became What was Payton's score on the test?
Solution:
The sum of the other scores was The sum of all scores was
Therefore Payton's score was
Thus, the correct answer is E.
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