A jar contains only red and blue marbles in a ratio of 4:6. If there are 42 blue marbles, how many red marbles are there?
- A. 70
- B. 42
- C. 32
- D. 28 ✓
Correct answer
D. 28
Explanation
The ratio 4:6 means for every 6 blue marbles there are 4 red. 42 blue ÷ 6 = 7 groups, so red marbles = 4 × 7 = 28.
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