Correct Answer - Option 3 : Rs. 1250

**Given: **

A tradesman sold an article at a loss of 50%. If the selling price had been increased by Rs. 1000, there would have been a gain of 30%.

**Calculation**

Let the C.P. of article be Rs. x.

130% of x - 50% of x = Rx. 1000

80% of x = Rx. 1000

x = Rs. (1000 × 100) / 80 = Rs. 1250

Hence, cost price of an article = Rs. 1250