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      Question

      In a mixed school 25% of the scholars are infants under

      7 and the number of girls above 7 is 4/5 of the number of boys above 7, and amounts to 120. Find the number of scholars in the school.
      A 200 Correct Answer Incorrect Answer
      B 360 Correct Answer Incorrect Answer
      C 420 Correct Answer Incorrect Answer
      D 240 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      Let the total number of scholars in the school be x. Number of infants under 7 = (25 x)/100=┬а x/4 тИ┤ Remaining scholars = x-┬а x/4 = (3 x)/4 тИ╡ Number of girls above 7 = 4/5 of Number of boys above 7 Now,┬а 120 = 4/5├Ч number of boys above 7 Number of boy above 7 = 150 тИ┤ 3x/4 = 120 + 150┬а тЗТ (3 x)/4 = 270┬а ┬а тЯ║┬а x = 360

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