| At what per cent above the cost price, must a shopkeeper marks his goods so that he gains 20% even after giving a discount of 10% on the marked price? |
A) 25%
B) 30%
C) \[33\frac{1}{3}%\]
D) \[37\frac{1}{2}%\]
Correct Answer: C
Solution :
| Let the CP be Rs. 100. Then, SP = Rs. 120 |
| Let the marked price be Rs. x. |
| Then, 90% of x =120 |
| \[\Rightarrow \] \[x=\frac{120\times 100}{90}=\frac{400}{3}=133\frac{1}{3}%\] |
| It means he should mark \[\left( 133\frac{1}{3}-100 \right)=33\frac{1}{3}%\]higher than CP. |
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