A jar contains only red and blue marbles in a ratio of 5:2. If there are 6 blue marbles, how many red marbles are there?
Difficulty: Medium
About this MCQ
Medium ACT item. Correct choice: C. 15.
- A. 21
Why not A: “21” is not 15.
- B. 20
Why not B: “20” is not 15.
- C. 15 ✓
- D. 6
Why not D: “6” is not 15.
Correct answer
C. 15
Explanation
15 (option C) is the accepted answer to “A jar contains only red and blue marbles in a ratio of 5:2. If there are 6 blue marbles, how many red marbles are there”. Option A (21) is a different value from 15. Option B (20) is a different value from 15. Option D (6) is a different value from 15. Keep 15 as the ACT fact for this stem.
Source: Original practice question, MCQsHub
Tags: Math, American Exams, ACT, Ratios
Submitted by: MCQsHub Editorial