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# Probability and Statistics

# Factorials and Permutations Examples

### Example 1

What are all the permutations of the numbers 1, 2, and 3? |

### Example 2

How many ways can we choose 3 books from 2 books, with repetition allowed? |

### Example 3

How many ways can we choose 2 books from 3 books, with repetition allowed? |