Cost price of the article is 33 1/3% of the marked price and by selling the article it made a profit of 40%. Discount offered on the article is Rs. 640. Find the selling price of the article when 33 1/3% discount is given on that article.

Correct option is A

Let the marked price of the article be 15x
Cost price = 1/3×15x=5x
Selling price = 5x×7/5=7x
ATQ, 15x – 7x = 640
8x = 640
x = 80
Now,
Marked price = 15×80=1200 Rs
Selling price = 1200×2/3=Rs.800