Mathematics A-Level
general multiplication rule
What general multiplication rule means in Mathematics A-Level, as defined for WJEC.
Definition of general multiplication rule
Check what you remember
Read the wording for your board, then hide it and explain general multiplication rule in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: WJEC
States that P(A ∩ B) = P(B) × P(A|B) = P(A) × P(B|A), provided P(A) > 0 and P(B) > 0.
Topics that use general multiplication rule
- Probability (A2 Unit 4: Applied Mathematics B) (WJEC A-Level)
Related terms
- Conditional probability
- conditional probability formula
- evaluating assumptions
- general addition rule
- independence violations
- model refinement
- probabilistic modelling
- Tree diagrams
Using general multiplication rule in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
Practise Mathematics questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
Start free
All Mathematics A-Level termsA week of Premium from your first lesson · Then the free plan continues · No card, no charge