Combinations and Permutations
Free SOA Exam P (Probability) lesson in General Probability. 15 min read, ~2,216 words.
Permutations (order matters):. Combinations (order doesn't):. Key question: does rearranging the selected objects create a different outcome? Yes = permutation. No = combination. Multinomial coefficient:, arrangements with repeated identical objects. Stars and bars: distributes identical objects into distinct bins. Circular permutations:, rotations are equivalent.
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What this lesson covers
- Content
- Example 1
- Example 2
- Example 3
- Common Mistakes
- Key Takeaways
- Exam Shortcuts
Learning objectives
- 1b
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