A jar contains only red and blue marbles in a ratio of 4:3. If there are 18 blue marbles, how many red marbles are there?

Correct answer

C. 24

Explanation

The ratio 4:3 means for every 3 blue marbles there are 4 red. 18 blue ÷ 3 = 6 groups, so red marbles = 4 × 6 = 24.

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