Loading…
Loading…
GCSE Mathematics · key term
The probability of an event when it is known that another event has occurred.
Used by AQA, Edexcel and OCR
Specification P9 · Paper 1, Paper 2, Paper 3
The probability that an event occurs when it is already known that another event has occurred.
Revise: Conditional ProbabilityA conditional probability considers only those members satisfying some extra information.
Specification P9 · Paper 1, Paper 2, Paper 3
Revise: Conditional ProbabilitiesConditional probability begins with extra information.
Specification 11.02c, 11.02f · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Foundation), Paper 4 (Higher), Paper 5 (Higher), Paper 6 (Higher)
The probability of an event when another event is already known to have happened.
Revise: Venn DiagramsAlways identify the group named after ‘given’ before choosing the denominator. This lets a Venn diagram solve conditional probability questions without requiring special set symbols.
The probability of an event when another event is known to have occurred; means the probability of given .
On a probability tree, multiply along a path and add separate paths. A second-stage branch gives a conditional probability only in the direction shown by the tree.
Create a free account to read GCSE Mathematics revision notes for your exam board and track your progress.