The cost price of 20 books is the same as the selling price of ’X’ books. If the profit is 28%, then the value of X is ? Choose the correct choice
A) 25 B) 13.8 C) 16 D) 15 E) 14
let S.P. of X books = Rs 100 = C.P. of 20 books   Therefore, C.P. of one book = Rs 5.6   Profit = 28 %   Therefore, S.P of one book = 7.2   S.P of X articles = 7.2 X   7.2 X = 100 =&gt; X = 13.8   ANSWER:13.8
<result>B</result>
The cost price of 20 books is the same as the selling price of ’X’ books. If the profit is 28%, then the value of X is ?