A) 15%
B) 20%
C) 25%
D) 30%
Correct Answer: C
Solution :
[c] Let the MP of shirt be Rs. x and that of trousers be Rs. 2x. Let y% be the discount on trousers. Then, \[\frac{60}{100}\times x+\frac{(100-y)}{100}\times 2x=\frac{70}{100}\times (x+2x)\] \[\Rightarrow \] \[\frac{3}{5}+\frac{(100-y)}{50}=\frac{21}{10}\] \[\Rightarrow \] \[\frac{(100-y)}{50}=\left( \frac{21}{10}-\frac{3}{5} \right)=\frac{15}{10}=\frac{3}{2}\] \[\Rightarrow \] \[(100-y)=\left( \frac{3}{2}\times 50 \right)=75\] \[\Rightarrow \] \[y=25\] \[\therefore \] Discount on trousers = 25% |
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