A jar contains only red and blue marbles in a ratio of 6:8. If there are 40 blue marbles, how many red marbles are there?
Difficulty: Medium
About this MCQ
Medium ACT item. Correct choice: D. 30.
- A. 70
Why not A: “70” is not 30.
- B. 36
Why not B: “36” is not 30.
- C. 40
Why not C: “40” is not 30.
- D. 30 ✓
Correct answer
D. 30
Explanation
30 (option D) is the accepted answer to “A jar contains only red and blue marbles in a ratio of 6:8. If there are 40 blue marbles, how many red marbles are there”. Option A (70) is a different value from 30. Option B (36) is a different value from 30. Option C (40) is a different value from 30. Keep 30 as the ACT fact for this stem.
Source: Original practice question, MCQsHub
Tags: Math, American Exams, ACT, Ratios
Submitted by: MCQsHub Editorial