A jar contains only red and blue marbles in a ratio of 3:9. If there are 72 blue marbles, how many red marbles are there?
Difficulty: Medium
About this MCQ
Medium GRE item. Correct choice: C. 24.
- A. 72
Why not A: “72” is not 24.
- B. 96
Why not B: “96” is not 24.
- C. 24 ✓
- D. 27
Why not D: “27” is not 24.
Correct answer
C. 24
Explanation
24 (option C) is the accepted answer to “A jar contains only red and blue marbles in a ratio of 3:9. If there are 72 blue marbles, how many red marbles are there”. Option A (72) is a different value from 24. Option B (96) is a different value from 24. Option D (27) is a different value from 24. Keep 24 as the GRE fact for this stem.
Source: Original practice question, MCQsHub
Tags: Math, American Exams, GRE, Ratios
Submitted by: MCQsHub Editorial
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