Definition:Combination with Repetition/Example

Example of Combination with Repetition
Let $S = \left\{ {a, b, c, d, e}\right\}$ be a set with $5$ elements.

The $3$-combinations of $S$ with repetition are:


 * $aaa, aab, aac, aad, aae,$
 * $abb, abc, abd, abe, acc,$
 * $acd, ace, add, ade, aee,$
 * $bbb, bbc, bbd, bbe, bcc,$
 * $bcd, bce, bdd, bde, bee,$
 * $ccc, ccd, cce, cdd, cde,$
 * $cee, ddd, dde, dee, eee$