A jar contains only red and blue marbles in a ratio of 5:6. If there are 24 blue marbles, how many red marbles are there?

Correct answer

A. 20

Explanation

The ratio 5:6 means for every 6 blue marbles there are 5 red. 24 blue ÷ 6 = 4 groups, so red marbles = 5 × 4 = 20.

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