A jar contains only red and blue marbles in a ratio of 9:5. If there are 30 blue marbles, how many red marbles are there?
Difficulty: Medium
About this MCQ
Medium GMAT item. Correct choice: A. 54.
- A. 54 ✓
- B. 84
Why not B: “84” is not 54.
- C. 63
Why not C: “63” is not 54.
- D. 30
Why not D: “30” is not 54.
Correct answer
A. 54
Explanation
54 (option A) is the accepted answer to “A jar contains only red and blue marbles in a ratio of 9:5. If there are 30 blue marbles, how many red marbles are there”. Option B (84) is a different value from 54. Option C (63) is a different value from 54. Option D (30) is a different value from 54. Keep 54 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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