A jar contains only red and blue marbles in a ratio of 3:7. If there are 28 blue marbles, how many red marbles are there?
Difficulty: Medium
About this MCQ
Medium ACT item. Correct choice: D. 12.
- A. 15
Why not A: “15” is not 12.
- B. 40
Why not B: “40” is not 12.
- C. 28
Why not C: “28” is not 12.
- D. 12 ✓
Correct answer
D. 12
Explanation
12 (option D) is the accepted answer to “A jar contains only red and blue marbles in a ratio of 3:7. If there are 28 blue marbles, how many red marbles are there”. Option A (15) is a different value from 12. Option B (40) is a different value from 12. Option C (28) is a different value from 12. Keep 12 as the ACT fact for this stem.
Source: Original practice question, MCQsHub
Tags: Math, American Exams, ACT, Ratios
Submitted by: MCQsHub Editorial
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