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# Year 10 Probability

### Definitions and facts from the NSW Year 10 Probability Topic

TermDefinition
Probability Another name for 'chance' or 'likelihood'. It is a measure of how likely an event is to occur
Experiment is an activity or process where the result in unknown or uncertain
Outcome the result of an experiment
Sample space all possible outcomes of an experiment
Event A result involving one or more outcomes
Trial is a single action
Random Sample is a sample for which every member of the population has an equal chance of selection
Equally likely each outcome has the same chance of occurring
Complementary Event The 'opposite event' or those outcomes which do not make up the event
Relative Frequency The number of times an event occurs compared with the total frequency
Certain Must occur. A probability of 1
Impossible Can not occur. A probability pf 0
Created by: wdobson

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