On decreasing the price of a colour TV by 10%, its sale is increased by 15%. The effect on the revenue is?	Pick:
A) 4.5% decrease  B) 4.5 % increase  C) 16% decrease  D) 16% increase  E) none of these
Net% change in revenue   = ( x + y + xy/100) %   = [-10 + 15 + ( -10 x 15)/100]% or 3.5%   ANSWnone of theseR:3..5
<result>E</result>
On decreasing the price of a colour TV by 10%, its sale is increased by 15%. The effect on the revenue is?