Combinations Question? In how many ways can 6 different books be distributed between 2 students, provided that both students receive at least one book?
Thanks for helping

Hint: We assume the books are all different. It is easier to count the number of ways to divide without restriction, and then subtract the $2$ forbidden ways.
Call the students $A$ and $B$. The number of ways to distribute without restriction is the number of ways to select a subset of the books to give to $A$. (So $B$ gets the rest.) How many subsets of the set of books are there?
