8th Class Mathematics Percentage Question Bank Percentage, Profit and Loss

  • question_answer Naresh sold two books for Rs. 600 each thereby gaining 20% on one book and losing 20% on the other book. Find his overall loss or gain percent.

    A)  8%                              

    B)  6%           

    C)  4%   

    D)  4.5%

    Correct Answer: C

    Solution :

    (c): C.P of 1s1 book be \[{{x}_{1}}\] \[\therefore 1.2{{x}_{1}}=600\] \[\Rightarrow {{x}_{1}}=\frac{600}{1.2}=500/-\] C.P of 2nd book be \[{{x}_{2}}\] \[\therefore 0.8\,{{x}_{2}}=600\] \[\Rightarrow {{x}_{2}}=\frac{600}{0.8}=750/-\] \[\therefore {{x}_{1}}+{{x}_{2}}=total\,C.P.=1250/-\] Total S.P = 1200/- \[\therefore Loss%=\frac{50}{1250}\times 100%\] \[=\frac{1}{25}\times 100%=4%\]         


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