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SSC Sample Paper Mock Test-18 SSC CGL Tear-II Paper-1

  • question_answer
    The marked price of a watch is Rs. 1600. The shopkeeper gives successive discount of 10%, r% to the customer. If the customer pays Rs. 1224 for the watch, then the value of r is

    A) 20%     

    B)  35%

    C)  37%    

    D)  None of these

    Correct Answer: D

    Solution :

    Marked price of article = Rs. 1600                \[\therefore \]Selling price \[=(100-10)%\]of\[(100-r)%\] of 1600 \[=\frac{90}{100}\times \frac{100-r}{100}\times 1600\] \[\Rightarrow \]   \[1224=\frac{9}{10}\times (100-r)\times 16\]             (Given) \[\Rightarrow \]   \[\frac{1224\times 10}{9\times 16}=(100-r)\] \[\Rightarrow \]   \[85=100-r\] \[\Rightarrow \]   \[r=100-85\] \[\Rightarrow \]   \[r=15%\]


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