A dealer professing to sell his goods at cost price, uses 900gm weight for 1 kg. His gain percent is
Choose one:
A) 13% B) 12 1/3% C) 11 1/9% D) 10% E) 12%
Gain % = ( Error/ (( True value) - Error)) *100 %   = (1000gm -900gm) / (1000 -100)* 100 %   = 100/900*100%   = 100/9   = 11 1/9 %   ANSWER:11 1/9%
<result>C</result>
A dealer professing to sell his goods at cost price, uses 900gm weight for 1 kg. His gain percent is