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      Question

      The ratio between the number of books and pencils is 6:5

      and the ratio of cost of per book and pencil is 4:3 then find the percentage by which total cost of book is greater than the total cost of pencil.
      A 70% Correct Answer Incorrect Answer
      B 50% Correct Answer Incorrect Answer
      C 60% Correct Answer Incorrect Answer
      D 40% Correct Answer Incorrect Answer
      E 80% Correct Answer Incorrect Answer

      Solution

      Number = books: Pencil = 6x : 5x Cost = books: pencil = 4y : 3y Total cost = books: Pencil = 24xy : 15xy Required % = [(24xy-15xy)/15xy] × 100 = 60%

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