- Definition of Probability
- Problem-Definition of Probability
- Problem solving on probability or weight of an outcome
- Equally Likely Outcomes
- Problem-Equally Likely Outcomes

- Problem-Simple Combined Events and Possibility Diagrams
- Simple Combined Events and Tree Diagrams
- Addition Principle for counting
- Venn Diagrams for counting
- Multiplication Principle for counting
- Problems on Counting Principles
- Introduction to Permutation
- Problem-Introduction to Permutation
- Permutation of Things Not All Different
- Problem-Permutation of Things Not All Different
- Circular Permutation
- Problem-Circular Permutation
- Word Problem on Permutation Principle
- Permutation formula application

- Introduction to Combinations
- Problem1-Introduction to Combinations
- Problem2-Introduction to Combinations
- Theorems on Combination
- Complementary Combination
- Problem1-Complementary Combination
- Problem2-Complementary Combination
- Pascal's Triangle
- Problem1-Pascal's Triangle
- Problem2-Pascal's Triangle