or you can also think this way 5 pairs = 10 socks
probablity of taking first one out 1 (because it can be from any pair)
probablity of taking the second one out which matches the first is 1/9
so the probablity is 1 * (1/9) = 1/9
"To dream anything that you want to dream, that is the beauty of the human mind. To do anything that you want to do, that is the strength of the human will. To trust yourself, to test your limits, that is the courage to succeed."
- Bernard Edmonds