A girl sold a book at a profit of 7%. Did she sold it for Rs.7.50 more, 22% would have been gained. Find the CP?
Choose the correct answer.
A) 40% B) 45% C) 50% D) 60% E) 69%
50%   50%
<result>C</result>
A girl sold a book at a profit of 7%. Did she sold it for Rs.7.50 more, 22% would have been gained. Find the CP?