Do to the deterministic nature of the game, if I have a decent memory I can easily know what cards are left in my deck, if not their order. I have two cards in my hand that let me draw a card (1 each) and I know there are 4 cards left in my deck, two of which will also let me draw a card. What are the chances I'll be able to draw my entire remaining deck?
Symbolizing the cards that give you a draw a D, and the cards that do not as N, there are 6 possible permutations of draw vs no-draw.
In each permutation, the second N card represents the farthest you can get through your deck on this turn. I have bolded it for easier visibility.