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      Question

      In a school, girls constitute 45% of the total strength

      of the school. Out of total number of students, 20% students were selected for annual sports competition which is 420 less than number of boys in the school. Find the number of girls selected for annual sports if the number of boys selected is 140.
      A 150 Correct Answer Incorrect Answer
      B 90 Correct Answer Incorrect Answer
      C 60 Correct Answer Incorrect Answer
      D 100 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Let total number of students in the school be ‘x’
      According to the question,
      0.20x + 420 = 0.55x
      Or, x = 420/0.35 = 1200
      Number of girls selected = 0.20x – 140 = 100

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