Originally Posted by LUCIUS VARENUS
OK I see what you're saying.
So what frequency will an 8 or better door card have a 3 card 8 or better?
About 25% absent info about door cards
There are going to be 7 unpairing low cards, 4 each for a total of 28 cards. So there are 28 cards possible for his first hole card, and 24 for the next, a total of 28*24 combos.
There are 52 possibilities for the first and 51 for the 2nd, a total of 52*51.
So the fraction that is a 3-card 8 is 28*24/52*51 = 25.3%
It'll be less if there are folded low cards, and more if there lots of folded high cards.