What is his percentage profit made by Nick if he purchased 10 dozen pens at Rs. 25 per dozen. He sold 3 dozens at 8% profit and the remaining 7 dozens with 14% profit? Select the correct option:
A) 15.2%
B) 17.2%
C) 12.2%
D) 11.2%
E) 13.2%
Explanation :   C.P of 10 dozens = Rs.(25 x 10) = Rs.250   C.P of 3 dozens = Rs. (25 x3) = Rs. 75.   C.P of 7 dozens =Rs. (25 x7) = Rs. 175   profit on 3 dozen at 8% = 8/100*75= 
<gadget id="calculator">8/100*75</gadget>
<output>6</output>
6   profit on 7 remaining dozen at 14%= 14/100*175= 
<gadget id="calculator">14/100*175</gadget>
<output>49/2 = around 24.5</output>
24.5   total profit= 6 + 24.5= 
<gadget id="calculator">6 + 24.5</gadget>
<output>30.5</output>
30.5   % profit= ?/100*250 = 30.5   = 12.2%   Answer : 12.2%
<result>C</result>
What is his percentage profit made by Nick if he purchased 10 dozen pens at Rs. 25 per dozen. He sold 3 dozens at 8% profit and the remaining 7 dozens with 14% profit?