The problem involves calculating the selling price of an item after a discount is applied. The item has a marked price of Rs. 500, and a 20% discount is offered.
To find the selling price, we must first calculate the discount amount:
Discount Amount = Marked Price × Discount Rate
Substitute the given values:
The fraction simplifies to:
Therefore, the discount amount is Rs. 100.
Now, subtract the discount amount from the marked price to find the selling price:
Selling Price = Marked Price - Discount Amount
Substitute the values:
Therefore, the selling price is Rs. 400, which matches the correct answer.