I don't know where this belongs but this seems close at least.

My partner and I have been going at this for over an hour. We are using nCr ish forumulas but this one doesn't seem to work...

If you are dealing from a standard deck of cards,

a)how many different 4-card hands could have at least one card from each suite

b)how many different 5-card hands could have at least one spade?

c) how many different 5-card hands could have at least 2 face cards(jacks, queens or kings)?

I am sorry if this is in the wrong board if if the title sucks. But thanks!