A jar contains only red and blue marbles in a ratio of 3:5. If there are 20 blue marbles, how many red marbles are there?
Difficulty: Medium
About this MCQ
Medium GMAT item. Correct choice: A. 12.
- A. 12 ✓
- B. 15
Why not B: “15” is not 12.
- C. 32
Why not C: “32” is not 12.
- D. 20
Why not D: “20” is not 12.
Correct answer
A. 12
Explanation
12 (option A) is the accepted answer to “A jar contains only red and blue marbles in a ratio of 3:5. If there are 20 blue marbles, how many red marbles are there”. Option B (15) is a different value from 12. Option C (32) is a different value from 12. Option D (20) is a different value from 12. Keep 12 as the GMAT fact for this stem.
Source: Original practice question, MCQsHub
Tags: Math, American Exams, Ratios, GMAT
Submitted by: MCQsHub Editorial
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