The marked price of a bicycle is 1500 rupees, which is 25 percent more than its cost price. If it is sold at a 10 percent discount, what is the profit percentage?

Correct option is A

Given:
Marked price = Rs. 1500
Mark up percent = 25%
Discount percentage = 10%
Formula Used:
​$$\text{Profit \%} = \left( \frac{\text{Selling Price} - \text{Cost Price}}{\text{Cost Price}} \right) \times 100$$​​
Solution:
Let the CP be 100x.
MP = 100x + 100x × 25%
=> 1500 = 125x
=> x = 12
CP = 100x = Rs. 1200
SP = 1500 - 1500 × 10%
=> SP = 1500 - 150
=> SP = Rs. 1350
​$$\text{Profit \%} = \left( \frac{\text{SP} - \text{CP}}{\text{CP}} \right) \times 100 \\\Rightarrow \left( \frac{1350 - 1200}{1200} \right) \times 100 \\\Rightarrow \left( \frac{150}{1200} \right) \times 100 \\\Rightarrow 12.5\%$$​​