1. Factorial of a Positive Integer – (30 - 2)

2. Exercise – (30 - 3)

3. Solution – (30 – 3a)

4. Solution – (30 – 3b)

5. Solution – (30 – 3c)

6. Exercise – (30 - 4)

7. Solution – (30 – 4a)

8. Solution – (30 – 4b)

9. Solution – (30 – 4c)

10. Solution – (30 – 4d)

11. Counting Formulas – (30 - 6)

12. Counting Formulas – (30 – 6a)

13. K-Sample – (30 - 7)

14. Example – (30 - 9)

15. Example – (30 - 15)

16. k-Permutation – (30 – 19)

17. Formula for k-Permutation – (30 - 20)

18. Formula for k-Permutation – (30 – 20a)

19. Exercise – (30 - 22)

20. Solution – (30 – 22a)

21. Exercise – (30 - 23)

22. Solution – (30 – 23a)

23. Exercise – (30 - 24)

24. Solution – (30 - 25)

25. Solution – (30 – 25a)

26. Exercise – (30 - 26)

27. Solution – (30 – 26a)