- The Counting Principles
- Simple Combined Events and Tree Diagrams
- 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

- Introduction to Combinations
- Problem1-Introduction to Combinations
- Problem2-Introduction to Combinations
- Theorems on Combination
- Complementary Combination
- Problem1-Complementary Combination
- Problem2-Complementary Combination

- Introduction
- Problem-Introduction to Probabillity
- Experiments and Sample Space
- Problem-Experiments and Sample Space
- Definition of Probability
- Problem-Definition of Probability
- Basic Terminology
- Problem Solving Strategies in Probability
- Probability and Venn Diagrams
- More on Probability and Venn Diagrams
- Possible Outcomes in the Sample Space
- Problem-Possible Outcomes in the Sample Space
- Simple Combined Events and Possibility Diagrams
- Problem-Simple Combined Events and Possibility Diagrams
- Simple Combined Events and Tree Diagrams
- Conditional Probability
- Addition of Probabilities and Mutually Exclusive Events
- Problem-Addition of Probabilities of Mutually Exclusive Events
- Estimating Probabilities and Tally Marks
- Problem-Estimating Probabilities and Tally Marks
- Multiplication of Probabilities and Independent Events
- More on Multiplication of Probabilities and Independent Events
- Problem-Multiplication of Probabilities of Independent Events
- Addition of Probabilities of Overlapping Events
- Problem-Addition of Probabilities of Overlapping Events
- Addition of Probabilities of Disjoint Events
- Addition of Probabilities of Subset Events
- Problem-Addition of Probabilities of Subset Events
- Multiplication of Probabilities of n Independent Events
- Problem-Multiplication of Probabilities of n Independent Events