If selling price is doubled, the profit triples. Find the profit percent. Choose the correct choice:
A) 20% B) 25% C) 30% D) 60% E) 100%
Let C.P. be Rs. x and S.P. be Rs. y.   Then, 3(y - x) = (2y - x) y = 2x.   Profit = Rs. (y - x) = Rs. (2x - x) = Rs. x.   Profit % = x	x 100	% = 100%   x   100%)
<result>E</result>
If selling price is doubled, the profit triples. Find the profit percent.