A retailer buys 40 pens at the marked price of 35 pens from a wholesaler. If he sells these pens giving a discount of 1%, what is the profit percent?	Select the correct option:
A) 12 %	B) 10 %	C) 15 %	D) 16 %	E) None
Sol.   Let the marked price of each pen be Re. 1.   Then, C.P. of 40 pens = Rs. 36. S.P. of 40 pens = 99% of Rs. 40 = Rs. 39.60.   ∴ Profit% = [3.60/36 * 100= 
<gadget id="calculator">3.60/36 * 100</gadget>
<output>10</output>
10%.   Answer 10 %
<result>B</result>
A retailer buys 40 pens at the marked price of 35 pens from a wholesaler. If he sells these pens giving a discount of 1%, what is the profit percent?