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      Question

      The present ages of 'A' and 'B' are in the ratio of

      3:7. The difference between their current ages is 12 years. How much percent older will 'B' be than 'A' three years from now?
      A 200% Correct Answer Incorrect Answer
      B 150% Correct Answer Incorrect Answer
      C 80% Correct Answer Incorrect Answer
      D 100% Correct Answer Incorrect Answer

      Solution

      Let the present ages of 'A' and 'B' be '3x' years and '7x' years, respectively. So, 7x - 3x = 12 Or, 4x = 12 So, x = 3 So, present age of 'A' = 3 X 3 = 9 years And present age of 'B' = 7 X 3 = 21 years So, three years hence from now, ages of 'A' and 'B' will be 12 years and 24 years, respectively. So, required percentage = {(24 - 12)/12} X 100 = 100%

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