Question

A businessman, by means of a false balance defrauds to an extent of 10% in buying goods and 10% in selling goods. Then, by how much percent does he gain?

• A. 21%
• B. 20%
• C. 19%
• D. 18%

Answer 1

The correct option is A 21%

Let us assume that if the dealer buys 100 units of a article he defrauds to an extent of 10%
he buys 10% more
fraud in buying=$100+\frac{10}{100}\times 100=110units$
In selling he sells 110 units at 10% profit
$110+\frac{10}{100}\times 110=121units$
gain made will be121-100=21 units
gain percantage=$\frac{21}{100}\times 100=21$%