**Concepts:**

- Linear Permutations
- Linear Permutations with Repetitions
- Combinations
- Factorials
- Simplifying Factorials

**Trains for:**

- Math Kangaroo 5-6
- Math Knagaroo 7-8
- MATHCOUNTS Chapter
- AMC 8
- Math Leagues

**Difficulty:** 3/5

Homework:

Resources:

Standards:

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