A) 10%
B) 20%
C) $ 16\frac{2}{3} $ %
D) $ 16\frac{1}{3} $ %
Correct Answer: C
$ \therefore $ SP of an article $ =\frac{x\times (100-40)}{100}=Rs.\frac{3x}{5} $ CP of an article $ =\frac{3x}{5}\times \frac{100}{100-30}=\frac{3x}{5}\times \frac{100}{70}=Rs.,\frac{6x}{7} $
$ \therefore $ Profit when sold at MP $ =( x-\frac{6x}{7} )=Rs.\frac{x}{7} $ Hence, profit percent $ =\frac{\frac{x}{7}}{\frac{6x}{7}}\times 100% $ =,\frac{50}{3} $ % $ =,16\frac{2}{3} $ %