A merchant marks his goods 40% above the cost price and sell them at a discount of 15%. Find his gain % = ?

Answer: Option C

Let the cost price = 100 units
Marked price = 140 units
Selling price = 140 × $$\frac{85}{100}$$   = 119
$$\begin{array}{rl}& \text{Profit }\%=\frac{19}{100}\times 100\\ & =19\%\end{array}$$