Aftab bought 65 books for Rs.1150 from one shop and 50 books for Rs.920 from another. What is the average price he paid per book ?
A. Rs.20
B. Rs.18
C. Rs.22
D. Rs.16
Average price per book = (1150 + 920) / (65 + 50) = 2070 / 115 = Rs.18