The price of a mobile phone is increased by 15%, and the new price is Rs. 11,500. What was the original price?

Correct option is B

Given:
New price = Rs. 11,500; Price increased by 15%.
Formula Used:
​$$\text{New Price} = \text{Original Price} \times \left(1 + \frac{\text{Percentage Increase}}{100}\right)$$​​
Solution:
​$$\text{Original Price} = \frac{\text{New Price}}{1 + \frac{\text{Percentage Increase}}{100}} \\= \frac{11500}{1.15} \\= 10000$$​​
Answer: (b) Rs. 10,000