Sock Drawer had 10 white socks and 4 black socks. List and count possible combinations:

Question

1) of two socks, if order matters
2) of two socks, if order doesn't matter
3) of three socks, if order matters
4) of three socks, if order doesn't matter

Answer 1

if order matters, it's a permutation.
Check your text for perms/combs with duplicates.