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    Question

    Section 3

    The average age of three children is 20 years. If their

    ages are in the ratio 1:2:3. 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
    E None of these Correct Answer Incorrect Answer

    Solution

    Total age of three children = 20 × 3 = 60 years Let their ages be x, 2x and 3x respectively. => x + 2x + 3x = 60 => 6x = 60 => x = 10 Therefore the age of youngest child = 1 × 10 = 10 years

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