Probability 7

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probability

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

outcome

a possible result of a probability experiment

trial

a single repetition or observation of an experiment

event

an outcome or set of outcomes of an experiment or situation

experiment

any activity based on chance (such as tossing a coin)

Fundamental Counting Principle

If one event has m possible outcomes and a second event has n possible outcomes after the first event has occurred, then there are m x n possible outcomes for the two events

sample space

all possible outcomes of an experiment

independent events

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

dependent events

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

experimental probability

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

complement

the set of all outcomes that are not the desired event


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