A shopkeeper purchased a chair marked at Rs. 600 at two successive discounts of 15% and 20% respectively, he spent Rs. 28 on transportation and sold the chair for Rs. 545. His gain percent was = ?

A. 25%

B. 30%

C. 35%

D. 20%

Answer: Option A

Solution(By Examveda Team)

Marked price of chair = Rs. 600
After discount, cost price
$$\eqalign{ & {\text{ = 600}} \times \frac{{85}}{{100}} \times \frac{{80}}{{100}} \cr & = {\text{Rs}}{\text{. }}408 \cr} $$
After transportation charges cost price
$$\eqalign{ & = 408 + 28{\text{ }} \cr & {\text{ = Rs}}{\text{. 436}} \cr & {\text{Gain }}\% \cr & = \frac{{545 - 436}}{{436}} \times 100\% \cr & = \frac{{109}}{{436}} \times 100\% \cr & = 25\% \cr} $$