MA36-04 Maths Coming soon
Conditional probability using diagrams
MA36-04
This lesson is coming soon.
In this lesson
Calculate conditional probability - the probability of a second event given information about a first - using two-way tables, tree diagrams or Venn diagrams, without formal P(A given B) notation.
What it covers
- Reading 'given that' as a signal to restrict to a reduced sample or subset before finding a probability
- Using a two-way table (restricting to the relevant row or column)
- Using a tree diagram (following the branch matching the given condition)
- Using a Venn diagram, expected-frequency style (restricting to within a set)
- Tracking exactly which specific item was already removed or given in without-replacement scenarios
Key words
For: AQA GCSE 8300, Edexcel GCSE 1MA1, Eduqas GCSE C300, Cambridge IGCSE 0580, Edexcel IGCSE 4MA1, OCR GCSE J560
On the specification
| Board | Spec | Statement |
|---|---|---|
| AQA GCSE 8300 | P9 | Calculate and interpret conditional probabilities through representation using expected frequencies with two-way tables, tree diagrams and Venn diagrams |
| Edexcel GCSE 1MA1 | P9 | Calculate and interpret conditional probabilities through representation using expected frequencies with two-way tables, tree diagrams and Venn diagrams |
| Eduqas GCSE C300 | HP9 | Calculate and interpret conditional probabilities through representation using expected frequencies with two-way tables, tree diagrams and Venn diagrams |
| Cambridge IGCSE 0580 | E8.4 | Calculate conditional probability using Venn diagrams, tree diagrams and tables. |
| Edexcel IGCSE 4MA1 | H6.3C | Use simple conditional probability when combining events |
| OCR GCSE J560 | 11.02c | Use a two-circle Venn diagram to enumerate sets, and use this to calculate related probabilities. Use simple set notation to describe simple sets of numbers or objects. |
For teachers
This GCSE Maths lesson teaches conditional probability using diagrams. By the end, students should be able to calculate conditional probability - the probability of a second event given information about a first - using two-way tables, tree diagrams or Venn diagrams, without formal P(A given B) notation. It works through two worked examples and the mistakes examiners report.