A jar contains only red and blue marbles in a ratio of 2:6. If there are 30 blue marbles, how many red marbles are there?
Difficulty: Medium
About this MCQ
Medium SAT item. Correct choice: D. 10.
- A. 12
Why not A: “12” is not 10.
- B. 30
Why not B: “30” is not 10.
- C. 40
Why not C: “40” is not 10.
- D. 10 ✓
Correct answer
D. 10
Explanation
10 (option D) is the accepted answer to “A jar contains only red and blue marbles in a ratio of 2:6. If there are 30 blue marbles, how many red marbles are there”. Option A (12) is a different value from 10. Option B (30) is a different value from 10. Option C (40) is a different value from 10. Keep 10 as the SAT fact for this stem.
Source: Original practice question, MCQsHub
Tags: SAT, Math, American Exams, Ratios
Submitted by: MCQsHub Editorial