If the selling price of 50 articles is equal to the cost price of 35 articles, then the loss or gain percent is:
Select:
A) 45%
B) 23%
C) 30%
D) 60%
E) 56%
C.P. of each article be Re. 1.   Then, C.P. of 50 articles = Rs. 50;   S.P. of 50 articles = Rs. 35.   Loss % = 15/50 * 100= 
<gadget id="calculator">15/50 * 100</gadget>
<output>30</output>
30%   ANSWER 30%
<result>C</result>
If the selling price of 50 articles is equal to the cost price of 35 articles, then the loss or gain percent is: