Topic: Probability Rules and Counting

Without-Replacement Draws Counted as Combinations

Why Sequential Choices Multiply

Why Repeated Objects Reduce the Number of Arrangements

Why Equally Likely Outcomes Give a Probability Ratio

Tree Diagrams for Listing Multi-Stage Outcomes

Restricted Permutations of Distinct Objects

Probabilities from Favorable and Total Counts

Partitioning Outcomes Into Disjoint Cases

Password and Code Probabilities

Mixed Problems With Codes, Committees, and Random Draws