- 18
- 20
- 22
- 24
- b
-
Total Books = 7
Sum of All Books / Total Books
(16*3) + (23*4) / 3+4
48+92 / 7
140/7=20
Total Books = 7
Sum of All Books / Total Books
(16*3) + (23*4) / 3+4
48+92 / 7
140/7=20