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Basic Probability

Mathematics, Probability and Poker


Contents


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Expectation

The study of probability originated with the study of games of chance and gambling, particularly dice games. One of the first concepts developed was that of expectation as a certainty equivalent.

Expectation, or expected value, is nothing more than an average. The first textbook on probability(1657) introduced the concept of expectation in this way -- If I have $3 in one closed fist and $7 in the other and offer you a choice, between the two that's equavilent to offering you $5. The expected value to you of the offer is $5.

Notice that you won't receive $5. You're either going to get $3 or $7, never $5. But, if you repeat the offer over and over, many times, it will average out to $5 per offer. This idea of expected value is a fundamental concept. Make sure you understand it before moving on.



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  • Alspach's Mathematics and Poker Page
    Brian Alspach used to write a regular column on combinatorics for Poker Digest. He's a retired math professor from Simon Fraser University.
  • Tom Ferguson's home page
    He's a math ;professor at UCLA and Chris Ferguson's father.
  • MathPages.com
    A collection of straight-forward introductions to various topics in mathematics and recreational mathematics.


Kelly betting

These are all somewhat technical articles.