Counting and Permutations

These sites cover permutation and combinations and also basic counting as it relates to probability and statistics. If you went through the first section thoroughly

Dr. math

Again Dr math helps us out by showing what permutation and combinations are. This is an important subject and you should know the difference and how to solve these types of problems.

Statistical Counting

This page teaches basic counting as it relates to statistics. A quick read so worth your time.

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