Before we go on to the next section, let's just mess with out "choose" formula for awhile...
Let's crunch these out:
Does this make sense? Think about it...
How many ways can you choose 0 things from 5 things?
One way -- you just sit there and do nothing!
How many ways can you choose 0 things from 0 things?
How many ways can you choose 1 thing from 6 things?