Given, price of CD = 120
Also, discount is 25% of orginal price.
We need to find out selling price.
⇒ Now, we know x% of n =
⇒25%discount on Rs.120 =
= Rs. 30
∴ Discount = Rs.30
⇒Now, Selling price after discount = original cost price - discount
⇒ Selling price after discount = 120-30
Hence, the selling price is RS.90
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