The ordered list $(A, B)$ of $2$ of the letters $A$, $B$, and $C$

Example · High school

Terms

Term	This example	Why
permutation	✓	The ordered list $(A, B)$ is a permutation of $2$ of the letters $A$, $B$, and $C$, because it lists $2$ different letters in order. The list $(B, A)$ is a different permutation.
combination	✗	The ordered list $(A, B)$ is not a combination, because a combination has no order; the combination $\setdef{A, B}$ corresponds to both $(A, B)$ and $(B, A)$.

Distinctions using this example

• Permutation vs. combination

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