2010 AMC 8 Problem 9
Attempt Problem 9 of the 2010 AMC 8 below, then check your answer against the professionally curated solution from LIVE by Po-Shen Loh. You can also try the full timed exam, view all 2010 AMC 8 solutions, or check the answer key.
All problems are used with official legal permission of the Mathematical Association of America (MAA).
9.
Ryan got of the problems correct on a -problem test, on a -problem test, and on a -problem test. What percent of all the problems did Ryan answer correctly?
Answer: D
Small hint:
Divide the total correct answers by the total number of problems.
Big hint:
Convert each test percentage into a number of correct answers.
Solution:
There were a total of problems.
On the first test, he solved problems.
On the second test, he solved problems.
On the third test, he solved problems.
Therefore, he solved a total of This means the fraction he solved is
Therefore, the answer is D .
Problem 9 in other years
- 1985 AMC 8
- 1986 AMC 8
- 1987 AMC 8
- 1988 AMC 8
- 1989 AMC 8
- 1990 AMC 8
- 1991 AMC 8
- 1992 AMC 8
- 1993 AMC 8
- 1994 AMC 8
- 1995 AMC 8
- 1996 AMC 8
- 1997 AMC 8
- 1998 AMC 8
- 1999 AMC 8
- 2000 AMC 8
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