Probability foundations
The deck as a counting problem. Everything else is built on this.
- 5 min1The deck is a probability space
Fifty-two equally likely cards, and why counting is all you need.
- 4 min2Probability versus odds
Two ways of saying the same thing, and when each one helps.
- 6 min3Combinations: counting without listing
C(n, k) and why order never matters for cards.
- 6 min4One card, then another
Multiplying probabilities across the turn and river, and why 'at least once' is easier backwards.