MathsNet: P - Probability - Illustration

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Page ID: 12497

P | Probability | Tree diagrams | «Illustration»

Where two or three events occur, following on from each other, the various outcomes can be illustrated clearly on a tree diagram . This is particularly useful when later events depend in some way on the outcomes of previous events.

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Summary/Background

A tree diagram is used to illustrate probabilities when two things happen by displaying outcomes and their probabilities on the branches. For example when two coins are spun, or if someone takes a counter from one bag followed by a counter from another bag, then the possibilities are shown on a tree diagram. The diagram shows all the possible outcomes. Usually the probability of each individual outcome is marked on each branch.

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This question appears in the following syllabi:

Syllabus	Module	Section	Topic	Exam Year
AQA GCSE (9-1) Foundation (UK)	P: Probability	P8: Combined Events	Tree Diagrams	-
CIE IGCSE (9-1) Maths (0626 UK)	8 Probability	B8.5 Simple Combined Events	Tree Diagrams	-
Edexcel GCSE (9-1) Foundation (UK)	P: Probability	P8: Combined Events	Tree Diagrams	-
GCSE Higher (UK)	Probability	Probability	Tree diagrams	-
OCR GCSE (9-1) Foundation (UK)	11: Probability	11.02d: Tree Diagrams	Tree Diagrams	-
Universal (all site questions)	P	Probability	Tree diagrams	-