I would like to ask. If someone has an AQ and I have got AJ what's the probability of hitting an A on the flop?
Assuming heads-up. Since you hold AQ and villain has AJ, there are 52-4=48 cards left on the deck, with 2 Aces remaining.
Prob[at least an Ace on the Flop] = 1-Prob[no Ace on Flop]=1-(46/48)(45/47)(44/46) = 1-0.878 = 12.2%