A) \[30%\]
B) \[33%\]
C) 40%
D) \[27%\]
Correct Answer: A
Solution :
Solving this type of question by short cut. Net profit \[%=x+y+\frac{xy}{100}\] \[17%=-10+y+\frac{\left( -10 \right)\times y}{100}\][\[\therefore \,\,'-'\]for discount] \[27=y-\frac{y}{10}\Rightarrow 27=\frac{10y-y}{10}\] \[27\times 10=9y\] \[y=30%\] Hence, He must mark his goods 30% higher than their cost price.You need to login to perform this action.
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