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      Question

      The average weight of a group of

      20 boys is 52 kg. If the total weight of a group of 14 girls is 30% less than the total weight of the group of boys, what is the ratio between the average weight of a boy and that of a girl, respectively?
      A 3:2 Correct Answer Incorrect Answer
      B 1:2 Correct Answer Incorrect Answer
      C 1:1 Correct Answer Incorrect Answer
      D 3:5 Correct Answer Incorrect Answer

      Solution

      ATQ,

      Total weight of all boys = 20 Γ— 52 = 1040 kg Total weight of all girls = 1040 Γ— 0.70 = 728 kg Average weight of a girl = 728 Γ· 14 = 52 kg Required ratio = 52:52 = 1:1

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