How many poker hands can you choose with at least one face card present (Jack, Queen or King)? Answer I found was: $${\binom {52}{5}} - {\binom {48}{5}}$$
Stumbled across this one and I don't really understand how I should think about it. Why is ${\tbinom {48}{5}}$ the way to cut out all combinations that do not furfill the criteria? The way I'm thinking is that you'd want to create a hand with purely "number" cards (i.e. from 1-10) therefore subtracting ${\tbinom {40}{5}}$ instead.
What am I missing in my way of thinking?
Thanks!