2024 AMC 12A Problem 5
Attempt Problem 5 of the 2024 AMC 12A 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 2024 AMC 12A solutions, or check the answer key.
All problems are used with official legal permission of the Mathematical Association of America (MAA).
5.
A data set containing numbers, some of which are has mean When all the s are removed, the data set has mean How many s were in the original data set?
Answer: D
Small hint:
The numbers sum to
Big hint:
If there are sixes, the remaining numbers sum to
Solution:
The full set sums to Removing sixes leaves numbers summing to with mean so Then giving Thus, the correct answer is D.
Problem 5 in other years
- 1950 AMC 12
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