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      Question

      The average weight of boys in a class is 65 kg, while

      the average weight of girls is 45 kg. If the overall average weight of the class is 50 kg and the total number of students is 52, determine the number of boys in the class.
      A 13 Correct Answer Incorrect Answer
      B 15 Correct Answer Incorrect Answer
      C 29 Correct Answer Incorrect Answer
      D 18 Correct Answer Incorrect Answer

      Solution

      Image Desired ratio = 3:1Ratio of number of boys to number of girls = 1:3Number of boys in the class = 1/4 ├Ч 52 = 13

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