A trader marked the selling price of an article at 10% above the cost price. At the time of selling, he allows certain discount and suffers a loss of 1%. He allowed a discount of :	Choose one.
A) 10 %
B) 10.5 %
C) 11 %
D) 12.5 %
E) None
Sol.   Let C.P. = Rs. 100. Then, Marked Price = Rs. 110, S.P. = Rs. 99.   ∴ Discount % = [11/110 * 100= 
<gadget id="calculator">11/110 * 100</gadget>
<output>10</output>
10%   10 %nswer 10 %
<result>A</result>
A trader marked the selling price of an article at 10% above the cost price. At the time of selling, he allows certain discount and suffers a loss of 1%. He allowed a discount of :