A tradesman by means of his false balance defrauds to the extent of 10%? in buying goods as well as by selling the goods. What percent does he gain on his outlay?	Select the correct option: A) 21% B) 77% C) 44% D) 16% E) 47%
g% = 10 + 10 + (10*10)/100= 
<gadget id="calculator">10 + 10 + (10*10)/100</gadget>
<output>21</output>
21%   21%nswer: 21%
<result>A</result>
A tradesman by means of his false balance defrauds to the extent of 10%? in buying goods as well as by selling the goods. What percent does he gain on his outlay?