Concept : 1 Mark
Application : 1 Mark
Calculation : 1 Mark
Given, Selling price = Rs 13,500
Loss%=20%
Let the cost price be x.
∴Loss=20% of x
Selling price = Cost price - Loss
⇒13500=x−20100×x
⇒13500=x−15x
⇒13500=45x
⇒x=16875
Therefore, she bought it for Rs 16875.