A shopkeeper cheats to the extent of 10% while buying as well as selling, by using false weights. His total gain is -
A. 10%
B. 11%
C. 20%
D. 21%
Answer: Option D
Solution(By Examveda Team)
$$\eqalign{ & {\text{Rule}}:{\text{Gain}}\% \cr & = \frac{{{{\left( {100 + {\text{common gain}}\% } \right)}^2}}}{{100}} - 100 \cr & \therefore {\text{Gain }}\% \cr & = \left[ {\frac{{{{\left( {100 + 10} \right)}^2}}}{{100}} - 100} \right]\% \cr & = \left( {\frac{{12100 - 10000}}{{100}}} \right)\% \cr & = 21\% \cr} $$Join The Discussion
Comments ( 2 )
Related Questions on Profit and Loss
A. 45 : 56
B. 45 : 51
C. 47 : 56
D. 47 : 51
A. Rs. 2600
B. Rs. 2700
C. Rs. 2800
D. Rs. 3000
A. A neither losses nor gains
B. A makes a profit of 11%
C. A makes a profit of 20%
D. B loses 20%
A. Rs. 3,750
B. Rs. 3,250
C. Rs. 2,750
D. Rs. 2,250
Wrong solution. Ans is 200/9%
details please