In a marble collection, the ratio of red marbles to blue marbles is 3 : 5. There are 24 marbles in total. How many BLUE marbles are there?
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Worked Solution
Step 1: Find the total number of parts in the ratio.
Total parts = 3 + 5 = 8 parts.
Step 2: Find the value of 1 part.
1 part = 24 ÷ 8 = 3 marbles.
Step 3: Find the number of blue marbles (5 parts).
Blue marbles = 5 × 3 = 15.
Answer: 15
Correct answer: 15
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