Edexcel GCSE Mathematics · 1MA1
Specification P3 · Paper 1, Paper 2, Paper 3
A number from 0 to 1 that measures how likely an event is to occur.
Revise: Relative Expected FrequenciesProbability describes how likely an event is to happen.
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GCSE Mathematics · key term
A number from 0 to 1 that measures how likely an event is to happen.
Used by Edexcel and OCR
Specification P3 · Paper 1, Paper 2, Paper 3
A number from 0 to 1 that measures how likely an event is to occur.
Revise: Relative Expected FrequenciesProbability describes how likely an event is to happen.
Specification 11.01a, 11.01d · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Foundation), Paper 4 (Higher), Paper 5 (Higher), Paper 6 (Higher)
Check whether the question asks for a probability or relative frequency (a proportion between 0 and 1) or an expected frequency (a number of occurrences).
On a probability scale, convert fractions and percentages to decimals if this makes their positions easier to compare.
A larger number of trials generally makes relative frequency a more reliable estimate, but it does not guarantee that every successive value will be closer to the theoretical probability.
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Probability measures how likely a random event is to happen. An event is something we are interested in, such as a tossed coin landing heads. Before the coin lands, the result is uncertain.