1. K-Combinations – (31 – 2a)

2. Notations for K-Combinations – (31 – 2b)

3. Example – (31 - 3)

4. Example – (31 - 4)

5. Solution – (31 – 4a)

6. Example – (31 - 5)

7. Example – (31 – 5a)

8. Example – (31 – 5b)

9. Example – (31 – 5c)

10. Example – (31 – 5d)

11. Formula for Combination – (31 - 6)

12. Example – (31 - 7)

13. Some Important Results – (31 - 8)

14. Exercise – (31 - 10)

15. Solution – (31 – 10a)

16. Solution – (31 – 10b)

17. Exercise – (31 - 11)

18. Solution – (31 - 12)

19. Exercise – (31 - 13)

20. Solution – (31 – 13a)