Hari purchased 20 dozen notebook at Rs. 48 per dozen. He sold 8 dozen at 10% profit and remaining 12 dozen with 20% profit. What is his profit percentage in the transaction? Choose one:
A) 8%
B) 15%
C) 16%
D) none of the above
E) Cannot be determined
Explanation :   C.P of 20 dozen = Rs.(48 x 20) = Rs.960   C.P of 8 dozen = Rs. (48 x8) = Rs. 384.   C.P of 12 dozen =Rs. (960 384) = Rs. 576   Total S.P = Rs. (110/100 x 384 +120/100 x 576) = Rs.1113.60   Profit % = (153.60/960 x 100)% =16%   Answer : 16%
<result>C</result>
Hari purchased 20 dozen notebook at Rs. 48 per dozen. He sold 8 dozen at 10% profit and remaining 12 dozen with 20% profit. What is his profit percentage in the transaction?