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    5. The average age of three children is 16 years. If their ages are in the ratio 3:4:5. Find the age of

    Question

    The average age of three children is 16 years. If their

    ages are in the ratio 3:4:5. Find the age of the youngest child.
    A 12 years Correct Answer Incorrect Answer
    B 10 years Correct Answer Incorrect Answer
    C 7 years Correct Answer Incorrect Answer
    D 15 years Correct Answer Incorrect Answer

    Solution

    Total age of three children = 16 × 3 = 48 years Let their ages be 3x, 4x and 5x respectively. => 3x + 4x + 5x = 48 => 12x = 48 => x = 4 Therefore the age of youngest child = 3 × 4 = 12 years

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