Alka bought 15 books for Rs.2580 from one shop and 20 books for Rs.920 from another. What is the average price he paid per book ?
Select the correct option
A) 104 B) 181 C) 100 D) 35 E) 20
Average price per book   = (2580 + 920) / (15 + 20)   = 3500 / 35   = Rs.100   Answer:100
<result>C</result>
Alka bought 15 books for Rs.2580 from one shop and 20 books for Rs.920 from another. What is the average price he paid per book ?