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      Question

      There are 1000 students in a school where the boy to girl

      ratio is 2:3. If 18% of boys and 12% of girls did not clear the final exam, find the total number of students who failed.
      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 = (2/5) × 1000 = 400

      Number of girls = (3/5) × 1000 = 600

      Required number of students = 0.18 × 400 + 0.12 × 600 = 72 + 72 = 144

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