A jar contains only red and blue marbles in a ratio of 2:7. If there are 28 blue marbles, how many red marbles are there?
Difficulty: Medium
About this MCQ
Medium GRE item. Correct choice: C. 8.
- A. 10
Why not A: “10” is not 8.
- B. 36
Why not B: “36” is not 8.
- C. 8 ✓
- D. 28
Why not D: “28” is not 8.
Correct answer
C. 8
Explanation
8 (option C) is the accepted answer to “A jar contains only red and blue marbles in a ratio of 2:7. If there are 28 blue marbles, how many red marbles are there”. Option A (10) is a different value from 8. Option B (36) is a different value from 8. Option D (28) is a different value from 8. Keep 8 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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