Originally Posted by snark
P(ace) x P(not ace) = (4/40) x (36/39) = 9.23%
You have to double that. The above is the probability to draw an Ace and a non-Ace in that specific order. You have to consider the opposite order also.
- Two non-Ace cards: C(36,2)/C(40,2) = 0.807692308
- One Ace and one non Ace: C(4,1)*C(35,2)/C(40,2) = 0.184615385
- Two Aces: C(4,2)/C(40,2) = 0.007692308