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    Aman offers a discount scheme, such that on buying 12 rough copies, get x rough copies for free. If the equivalent percentage discount is 25%, th
    Question

    Aman offers a discount scheme, such that on buying 12 rough copies, get x rough copies for free. If the equivalent percentage discount is 25%, then what is the value of x?

    A.

    3

    B.

    6

    C.

    4

    D.

    5

    Correct option is C

    Given:

    Total rough copies bought: 12

    Free rough copies: x

    Discount percentage: 25%

    Solution:

    Here, the total number of copies = 12 + x.

    25=x12+x×100 x12+x=25100=14 x=14×(12+x)25 = \frac{x}{12 + x} \times 100 \\ \ \\\frac{x}{12 + x} = \frac{25}{100} = \frac{1}{4} \\ \ \\x = \frac{1}{4} \times (12 + x)

    4x = 12 + x

    4x - x = 12

    3x = 12

    x = 4
    The value of x is 4.

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