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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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