Rahim bought 40 books for Rs.600 from one shop and 20 books for Rs.240 from another. What is the average price he paid per book ? Choose the correct choice from the following choices:	A) s . 14	B) s . 18	C) s . 12	D) s . 11	E) s . 10

Rationale: "average price per book = ( 600 + 240 ) / ( 40 + 20 ) = 840 / 60 = rs . 14 answer : a"
Answer: A