8 out of 15? books
1 out of 4 books
3 out of 4 books
2 out of 4 books
2 out of 2 books
1 out of 3? books
4 out of 6 books
1 out of 3 books
2 out of 4? books
1 out of 12 books
1 out of 2? books
1 out of 2 books
5 out of 6 books
2 out of 8 books
1 out of 9 books
1 out of 7 books