Sandy bought 65 books for $1380 from one shop and 55 books for $900 from another shop. What is the average price that Sandy paid per book?	Choose one
A) $ 13	B) $ 15	C) $ 17	D) $ 19	E) $ 21

Rationale: average price per book = ( 1380 + 900 ) / ( 65 + 55 ) = 2280 / 120 = $ 19 the answer is d .
Answer: D