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Practical Poker Math

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5. Odds in Omaha Hi-Lo<br />

for 2 or more Aces in the hole. The calculation that will serve<br />

you best is for exactly 2 Aces in the hole, because in Omaha<br />

Hi-Lo, 3 or more cards of the same rank in the hole is NOT<br />

a good thing. Omaha Hi-Lo is one of the very few places in<br />

all of poker where a hand containing 4 hidden Aces is a huge<br />

disappointment.<br />

Start with 270,725 — the total possible 4-card combinations<br />

from a deck of 52 cards.<br />

Find the number of 2-card combinations that contain a pair<br />

of Aces — Comb(4, 2):<br />

(4 * 3) = 6<br />

(1 * 2)<br />

The last number we need is the number of 2-card combinations<br />

that contain no Aces — Comb(48, 2):<br />

(48 * 47) = 1,128<br />

(1 * 2)<br />

To find the total number of 4-card combinations that contain<br />

exactly 2 Aces, multiply the number of 2-card combinations<br />

that WILL contain 2 Aces (6) by the number of 2-card<br />

combinations that WILLNOT contain any Aces (1,128):<br />

6 * 1,128 = 6,768<br />

The probability of 2 and only 2 Aces in the pocket in Omaha<br />

Hi-Lo expressed as a percentage is<br />

WILLs<br />

* 100 = Probability as %<br />

Total Possibilities<br />

6.768 * 100 = 2.5%<br />

270,725<br />

152

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