A jar contains only red and blue marbles in a ratio of 3:7. If there are 21 blue marbles; how many red marbles are there?
Difficulty: Medium
About this MCQ
Medium SAT item. Correct choice: A. 9.
- A. 9 ✓
- B. 6
Why not B: “6” is not 9.
- C. 14
Why not C: “14” is not 9.
- D. 12
Why not D: “12” is not 9.
Correct answer
A. 9
Explanation
9 (option A) is the accepted answer to “A jar contains only red and blue marbles in a ratio of 3:7. If there are 21 blue marbles; how many red marbles are there”. Option B (6) is a different value from 9. Option C (14) is a different value from 9. Option D (12) is a different value from 9. Keep 9 as the SAT fact for this stem.
Source: Original practice question; MCQsHub
Tags: SAT, Math, American Exams, Ratios
Submitted by: MCQsHub Editorial
Related MCQs
- In the sentence 'The novel's plot was labyrinthine; full of twists that confused even careful readers;' the wo...
- If the perimeter of a square is 36 units; what is its area?
- What is the median of the data set: 4; 8; 15; 16; 23; 42?
- If y = 2x + 1 and x = 3; what is the value of y?
- In the sentence 'The committee reached a consensus after much deliberation;' the word 'consensus' most nearly...
- A line has a slope of 3 and passes through the point (0; 2). What is its equation?