A jar contains only red and blue marbles in a ratio of 9:3. If there are 18 blue marbles, how many red marbles are there?
Difficulty: Medium
About this MCQ
Medium SAT item. Correct choice: B. 54.
- A. 72
Why not A: “72” is not 54.
- B. 54 ✓
- C. 63
Why not C: “63” is not 54.
- D. 18
Why not D: “18” is not 54.
Correct answer
B. 54
Explanation
54 (option B) is the accepted answer to “A jar contains only red and blue marbles in a ratio of 9:3. If there are 18 blue marbles, how many red marbles are there”. Option A (72) is a different value from 54. Option C (63) is a different value from 54. Option D (18) is a different value from 54. Keep 54 as the SAT fact for this stem.
Source: Original practice question, MCQsHub
Tags: SAT, Math, American Exams, Ratios
Submitted by: MCQsHub Editorial