Hi all

The question is:

Given a 52 card deck, how many hands of 5 cards have

a) exactly 3 aces?

My guess is 4 x 3 x 2 x 48 x 47. Although this is not correct according to my text book.

b) at least 3 aces?

My guess is, having 3 aces plus having 4 aces = (4 x 3 x 2 x 48 x 47) + (4 x 3 x 2 x 1 x 48) . This is also not correct