A coconut merchant finds that the cost price of 2750 coconuts is the same as the selling price of 2500 coconuts. His loss or gain will be = ?

Answer: Option B

According to the question,
2750 Cost Price = 2500 Selling Price
$$\begin{array}{rl}& \frac{\text{CP}}{\text{SP}}=\frac{2500}{2750}=\frac{10}{11}⟩\text{1 unit profit}\\ & \text{Profit}\%=\frac{1}{10}\times 100\\ & =10\%\text{ gain}\end{array}$$