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      Question

      Ratio of number of boys to girls in a school is 5:6

      respectively. Next year, 25 boys and 30 girls left the school and 75 boys and 60 girls joined the school. If ratio becomes 1:1, then find number of boys now.
      A 200 Correct Answer Incorrect Answer
      B 225 Correct Answer Incorrect Answer
      C 150 Correct Answer Incorrect Answer
      D 175 Correct Answer Incorrect Answer

      Solution

      Let the initial number of boys and girls be '5n' and '6n' respectively. (5n - 25 + 75) :(6n - 30 + 60) = 1:1 Or, 5n + 50 = 6n + 30 Or, n = 20 Required number of boys = 5 X 20 - 25 + 75 = 150

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