What is his percentage profit made by Nancy if she purchased 15 dozen pencils at Rs. 20 per dozen. He sold 8 dozens at 12% profit and the remaining 7 dozens with 15% profit?  Choose the correct choice from the following answers
A) 10.08%  B) 18.08%  C) 15.08%  D) 12.08%  E) 16.08%
Explanation :   C.P of 15 dozen = Rs.(20 x 15) = Rs.300   C.P of 8 dozen = Rs. (20 x8) = Rs. 160.   C.P of 7 dozen =Rs. (20 x7) = Rs. 140   profit on 8 dozen at 12% = 12/100*160= 
<gadget id="calculator">12/100*160</gadget>
<output>96/5 = around 19.2</output>
19.2   profit on 7 remaining dozen at 15%= 15/100*140= 
<gadget id="calculator">15/100*140</gadget>
<output>21</output>
21   total profit= 19.2 + 21= 
<gadget id="calculator">19.2 + 21</gadget>
<output>40.2</output>
40.2   % profit= ?/100*250 = 40.2   = 16.08%   Answer : 16.08%
<result>E</result>
What is his percentage profit made by Nancy if she purchased 15 dozen pencils at Rs. 20 per dozen. He sold 8 dozens at 12% profit and the remaining 7 dozens with 15% profit?