If n is a list or set, then randcomb returns a random combination of m elements of n. If n is a positive integer, a random combination of m of the first n positive integers is returned.

The command with(combinat,randcomb) allows the use of the abbreviated form of this command.

$\mathrm{with}\left(\mathrm{combinat}\,\mathrm{randcomb}\right)$

$\left[\mathrm{randcomb}\right]$

$\mathrm{randcomb}\left(5\,3\right)$

$\left\{1\,3\,4\right\}$

$\mathrm{randcomb}\left(\left[a\,b\,c\,d\right]\,2\right)$

$\left[a\,d\right]$

$\mathrm{randcomb}\left(\left\{W\,X\,Y\,Z\right\}\,1\right)$

$\left\{X\right\}$