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      Question

      Among 1080 students in an institute, the ratio of boys to

      girls is 6:3. If 10% of boys and 20% of girls failed their exams, calculate the number of failed students.
      A 240 Correct Answer Incorrect Answer
      B 160 Correct Answer Incorrect Answer
      C 144 Correct Answer Incorrect Answer
      D 285 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      ATQ,

      Number of boys = (6/9) × 1080 = 720

      Number of girls = (3/9) × 1080 = 360

      Required number of students = 0.10 × 720 + 0.20 × 360 = 72 + 72 = 144

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