A jar contains only red and blue marbles in a ratio of 7:3. If there are 24 blue marbles, how many red marbles are there?
- A. 80
- B. 63
- C. 24
- D. 56 ✓
Correct answer
D. 56
Explanation
The ratio 7:3 means for every 3 blue marbles there are 7 red. 24 blue ÷ 3 = 8 groups, so red marbles = 7 × 8 = 56.
Related MCQs
- If 3x + 7 = 22; what is the value of x?
- If f(x) = x² - 3; what is f(4)?
- A line has a slope of 3 and passes through the point (0; 2). What is its equation?
- In the sentence 'The committee reached a consensus after much deliberation;' the word 'consensus' most nearly...
- If 2x + y = 10 and x - y = 2; what is the value of x?
- A jar contains only red and blue marbles in a ratio of 3:7. If there are 21 blue marbles; how many red marbles...