If the selling price of 50 articles is equal to the cost price of 30 articles, then the loss or gain percent is: Choose the correct option:	A) 10%	B) 40%	C) 30%	D) 25%	E) 35%
Let C.P. of each article be Re. 1.   Then, C.P. of 50 articles = Rs. 50;   S.P. of 50 articles = Rs. 30.   Loss % = 20/50 * 100= 
<gadget id="calculator">20/50 * 100</gadget>
<output>40</output>
40%   ANSWER:40%
<result>B</result>
If the selling price of 50 articles is equal to the cost price of 30 articles, then the loss or gain percent is: