1989 AMC 8 Problem 17
Attempt Problem 17 of the 1989 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 1989 AMC 8 solutions, or check the answer key.
All problems are used with official legal permission of the Mathematical Association of America (MAA).
17.
The number is between and Which of the following could be the average of and
Answer: B
Small hint:
The average is find its value at each end of the range for
Big hint:
As runs from to the average runs from to
Solution:
The average is When this is and when it is
So the average lies strictly between about and Among the choices, only falls in this range.
Thus, the correct answer is B .
Problem 17 in other years
- 1985 AMC 8
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