A tradesman by means of his false balance defrauds to the extent of 20%? in buying goods as well as by selling the goods. What percent does he gain on his outlay?
A. 20% B. 45%  Choose the correct answer:  A) 77  B) 66  C) 44  D) 99  E) 11

Rationale: g % = 20 + 20 + ( 20 * 20 ) / 100 = 44 % answer : c
Answer: C