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Mathematics LibreTexts

5: Probability

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  • 5.1: Introduction on Probability
  • 5.2: Expected Value
    Expected value is perhaps the most useful probability concept we will discuss. It has many applications, from insurance policies to making financial decisions, and it's one thing that the casinos and government agencies that run gambling operations and lotteries hope most people never learn about.
  • 5.3: Probability Rules- “And” and “Or”
  • 5.4: Counting Methods
    So far the problems we have looked at had rather small total number of outcomes. We could easily count the number of elements in the sample space. If there are a large number of elements in the sample space we can use counting techniques such as permutations or combinations to count them.
  • 5.5: Conditional Probabilities
    What do you think the probability is that a man is over six feet tall? If you knew that both his parents were tall would you change your estimate of the probability? A conditional probability is a probability that is based on some prior knowledge.


5: Probability is shared under a not declared license and was authored, remixed, and/or curated by LibreTexts.

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