Supriya sold a washing machine for Rs. 8500. She incurred a loss of 15% in this transaction. At what price had she bought the washing machine ?

Answer: Option A

Selling price of washing machine = Rs. 8500
Loss % = 15%
Cost price of washing machine
$$\begin{array}{rl}& =\text{Rs}\text{.}\left(\frac{100}{85}\times 8500\right)\\ & =\text{Rs}\text{.10000}\end{array}$$