The cost price of 13 articles is equal to the selling price of 11 articles. Find the profit percent?
Choose the correct choice from the following answers.
A) 18 2/81%  B) 18 2/11%  C) 18 3/11%  D) 18 1/11%  E) 18 2/15%
13 CP = 11 SP   11 --- 2 CP   100 --- ? =&gt;18 2/11%   Answer: 18 2/11%
<result>B</result>
The cost price of 13 articles is equal to the selling price of 11 articles. Find the profit percent?