A jar contains only red and blue marbles in a ratio of 9:7. If there are 49 blue marbles, how many red marbles are there?
Difficulty: Medium
About this MCQ
Medium GRE item. Correct choice: D. 63.
- A. 49
Why not A: “49” is not 63.
- B. 112
Why not B: “112” is not 63.
- C. 72
Why not C: “72” is not 63.
- D. 63 ✓
Correct answer
D. 63
Explanation
63 (option D) is the accepted answer to “A jar contains only red and blue marbles in a ratio of 9:7. If there are 49 blue marbles, how many red marbles are there”. Option A (49) is a different value from 63. Option B (112) is a different value from 63. Option C (72) is a different value from 63. Keep 63 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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