Basic ProbabilityAQA GCSE Maths: Flashcards

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What is the probability scale range?

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What is the probability scale range?: From 0 (impossible) to 1 (certain).
What do the probabilities of an exhaustive set of outcomes sum to?: 1
How do you calculate relative frequency?: Number of successful trials ÷ total number of trials.
How does relative frequency relate to theoretical probability as trials increase?: It tends to get closer to the theoretical probability.
What are mutually exclusive events?: Events that cannot both happen at the same time.
How do you calculate an expected outcome?: Probability of the event × number of trials.
What is a possibility space?: A diagram or table listing every equally likely outcome of an experiment.
How many outcomes are in the possibility space for rolling two fair six-sided dice?: 36 (6 × 6).
If $P(\text{win}) = 0.2$ , what is $P(\text{not win})$ ?: $1 - 0.2 = 0.8$
Name three ways of expressing a probability.: As a fraction, a decimal, or a percentage.