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      Question

      In a school with 800 students, the average of the age of

      the boys is 16 years and that of the girls is 12 years. If the average age of the school is 14 years 9 months. Then the number of girls in the school is.
      A 350 Correct Answer Incorrect Answer
      B 550 Correct Answer Incorrect Answer
      C 250 Correct Answer Incorrect Answer
      D 450 Correct Answer Incorrect Answer

      Solution

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