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    Question

    The average age of Rohit’s parents is 42 years.

    The ratio of his father and mother’s age is 4 : 3 respectively. Find his mother’s age?
    A 34 years Correct Answer Incorrect Answer
    B 38 years Correct Answer Incorrect Answer
    C 42 years Correct Answer Incorrect Answer
    D 36 years Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Let the father’s age be 4x years Mother’s age = 3x years According to question (4x + 3x)/2 = 42 7x/2 = 42 x = (2 × 42)/7 x = 12 years Mother’s age = 3x = 3 × 12 = 36 years

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