probability - the likelihood of an event occurring, 1/4 or .25 or 25% - three ways to express probability, theoretical probability - the actual probability, ex. P(4 on dice) = 1/6, experimental probability - the probability based on a set of recorded experiments, certain - a likelihood of 100%, impossible - a likelihood of 0%, independent events - events that have no effect on one another, dependent events - events that are affected by the other occurring, mutually exclusive - events that cannot be in the same category, complement of an event B - any outcome not in B, must add to 1 or 100% - probability of any event and its complement, probability of ANY event (numerically) - must be between 0 and 1, inclusive, OR - add the probabilities, AND - multiply the probabilities, sample space - the set of all possible outcomes, equally likely events - events that have equal probabilities of occurring, fair coin or fair dice - a balanced coin or die such that each outcome is equally likely,

PROBABILITY VOCABULARY

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