​Susan sold her used mobile phone for ₹4,800 and felt that she incurred a loss of 20%. To earn a profit of 12%, at what price should it have been sold (in ₹)?

Correct option is C

​Given:

Selling price (SP) = ₹4,800. Loss = 20%.

Formula Used:
Cost Price (CP) = $$\frac{\text{SP}}{1 - \text{Loss \%}}$$​

New SP = $$\text{CP} \times (1 + \text{Profit \%})$$​​

Solution: 

Cost Price at 20% loss: 

​$$\text{CP} = \frac{4800}{1 - 0.20} = \frac{4800}{0.8} = 6000$$

For 12% profit New Selling Price; 

​$$\text{New SP} = 6000 \times 1.12 = 6720$$​​