7th Class Mathematics Comparing Quantities Question Bank Comparing Quantities

  • question_answer
    11 oranges are bought for Rs.10 and 10 oranges are sold for Rs.11. The gain/loss percent is ____.

    A)  21% loss        

    B)  11% gain       

    C)         21% gain      

    D)         11% loss        

    Correct Answer: C

    Solution :

    C.P. of 11 oranges = Rs.10 \[\therefore \]  C.P. of 1 orange \[=Rs.\,\left( \frac{10}{11} \right)\] Also, S.P. of 10 oranges =Rs. 11 \[\therefore \]  S.P. of 1 orange \[=Rs.\,\left( \frac{11}{10} \right)\] Now, Profit             \[=S.P.-C.P.=\frac{11}{10}-\frac{10}{11}=Rs.\,\left( \frac{21}{110} \right)\] \[\therefore \]  Profit % \[=\frac{\frac{21}{110}}{\frac{10}{11}}\times 100=21%\]


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