question_answer

A dishonest merchant uses a defective weight balance to measure the weight of the article he purchased or sold at his outlet. When he purchases the goods for his outlet he uses to measure 10% less than the usual weight while selling the same goods he uses to measure 10% more than the usual weight. If he sells certain weight of goods to someone, his gain will be:

A)  20%                

B)  23%

C)  12%                            

D)  21%

E)  None of these