Correct option is C
Given:
The marked price of the article is Rs. 640, and a discount of 37.5% is given.
Formula Used:
Discount Amount = (Discount % / 100) * Marked Price.
Selling Price = Marked Price - Discount Amount.
Solution:
Discount Amount = (37.5 / 100) * 640 = Rs. 240.00.
Therefore, the selling price of the article = 640 - 240.00 = Rs. 400.00.