+529 Find the number of ways that Magnus can give out $12$ identical stickers to $2$ of his friends, if every friend gets at least one sticker.
+953 Let's list out all the cases we have.
\(1-11\\ 2-10\\ 3-9\\ 4-8\\ 5-7\\ 6-6\\ 7-5\\ 8-4\\ 9-3\\ 10-2\\ 11-1\)
We have 11 ways we can do this.
Thanks! :)
