A shopkeeper buys mangoes at the rate of 4 a rupee and sells them at 3 a rupee. Find his net profit or loss percent?	Choose the correct choice from the following.
A) 31%  B) 38 1/3%  C) 33 1/3%  D) 33%  E) 35%
C   33 1/3%   The total number of mangoes bought by the shopkeeper be 12.   If he buys 4 a rupee, his 33 1/3%P = 3   He selling at 3 a rupee, his SP = 4   Profit = SP - 33 1/3%P = 4 - 3= 
<gadget id="calculator">4 - 3</gadget>
<output>1</output>
1   Profit Percent= 1/3 * 100 = 33 1/3 %
<result>C</result>
A shopkeeper buys mangoes at the rate of 4 a rupee and sells them at 3 a rupee. Find his net profit or loss percent?