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    Question

    Average age of 3 children born at intervals of 2 years

    is 8. How old is the eldest child?
    A 12 years Correct Answer Incorrect Answer
    B 7 years Correct Answer Incorrect Answer
    C 8 years Correct Answer Incorrect Answer
    D 10 years Correct Answer Incorrect Answer

    Solution

    Let the age of three children are x, (x + 2) and (x + 4) The average age of 3 children = 8. According to the question [x + x + 2 + x + 4] = 3 x 8 ┬а 3x + 6 = 24 3x = 24-6 ┬а 3x = 18 x = 6 Age of the eldest son = 6 + 4 = 10 years.

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