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Railways R.R.C. (Patna) Solved Paper Held on 2nd Shift 9-11-2014

  • question_answer
    A pen is listed for Rs. 12. A discount of 15% is given on it. A second discount is given bringing the price down to Rs. 8.16. The rate of second discount is?

    A) 15%                             

    B) 18%

    C) 20%                             

    D) 25%

    Correct Answer: C

    Solution :

    The rate of pen after first discount \[=\frac{12\times 85}{100}\] \[=Rs.\,\,10.2\] If the rate of second discount = x%, then \[10.2\times \frac{(100-x)}{100}=8.16\] \[\therefore \]      \[\Rightarrow \,\,\,\,\,\,\,\,\,\,100-x=80\]\[100-x=80\] \[\therefore \]      \[x=20%\]


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