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permutation

an arrangement of items or events in which order is important.

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independent events

events for which the outcome of one even does not affect the probability of the other.

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dependent events

events for which the outcome of the first event affects the probability of the second event.

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combination

an arrangement of items or events in which the order does not matter.

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factorial

the product of all whole numbers except zero that are less or equal to the number.

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event

an outcome or set of outcomes of an experiment or situation.

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probability

a number from 0 to 1 (or 0% to 100%) that describes how likely an event is to occur.

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trial

in probability, a single repetition or observation of an experiment.

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outcome

a possible result of a probability experiment.

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experiment

in probability, an activity based on chance, such as tossing a coin.

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complement

the set of all outcomes that are not the desired event.

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experimental probability

the ratio of the number of times an event occurs to the total number of trials, or times that the activity is performed.

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sample space

all possible outcomes of an experiment.

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Fundamental Counting Principle

If one event has "m" possible outcomes and a second event has "n" possible outcomes after the first even has occurred, then there are "m*n" total possible outcomes for the two events.

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theoretical probability

the ratio of the number of equally likely outcomes in an event to the total number of possible outcomes.

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prediction

something you can reasonably expect to happen in the future.

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fair

when all outcomes of an experiment are equally likely.

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equally likely

outcomes that have the same probability.

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simple event

an event consisting of only one outcome.

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compound event

an even made up of two or more simple events.

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