1985 AMC 8 Problem 17
Attempt Problem 17 of the 1985 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 1985 AMC 8 solutions, or check the answer key.
All problems are used with official legal permission of the Mathematical Association of America (MAA).
17.
If your average score on your first six mathematics tests was and your average score on your first seven mathematics tests was then your score on the seventh test was
Answer: D
Small hint:
The total for seven tests is and the total for six tests is
Big hint:
The seventh score is the difference between those two totals
Solution:
Seven tests averaging total points; six tests averaging total points.
The seventh score is
Thus, the correct answer is D .
Problem 17 in other years
- 1986 AMC 8
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