Rahim 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 ? Choose the correct choice from the following choices:
A) 28
B) 18
C) 27
D) 29
E) 21
Average price per book   = (1150 + 920) / (65 + 50)   = 2070 / 115   = Rs.18   Answer:18
<result>B</result>
Rahim 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 ?