On decreasing the price of a cooler by 25 %, its sale is increased by 50%. The effect on the revenue is?
Choose the correct choice from the following choices:	A) 4 % decrease	B) 12.5 % increase	C) 16% decrease	D) 16% increase	E) none of these
Net% change in revenue   = ( x + y + xy/100) %   = [-25 + 50+ ( -25 x 50)/100]% or 12.5%   ANSWER:12.5 % increase
<result>B</result>
On decreasing the price of a cooler by 25 %, its sale is increased by 50%. The effect on the revenue is?