An article costs Rs. 600. What should be the marked price of an article so that after 10% discount, the trader makes 20% profit?  Choose the correct answer.
A) Rs. 802
B) Rs. 800
C) Rs. 8029
D) Rs. 888
E) Rs. 8128
Explanation:   Cost price of article = Rs. 600   Profit % = 20%   Therefore,   selling price of article = 120% of C.P.   = (120 / 100) * 600 = Rs. 720   Marked price = ?   Discount % = 10%   S.P. = Rs. 720   90% of M.P. = S.P.   90/100 * M.P. = 720   M.P. = 720 * (100/90) = Rs. 800'   ANSWER: Rs. 800
<result>B</result>
An article costs Rs. 600. What should be the marked price of an article so that after 10% discount, the trader makes 20% profit?