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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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