multiplication rule
What multiplication rule means in Mathematics A-Level, as defined for AQA, WJEC.
Definitions of multiplication rule
Exam boards and our study guides word this term in slightly different ways. Learn the version your board uses.
Check what you remember
Read the wording for your board, then hide it and explain multiplication rule in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: WJEC
Independence is defined formally by the multiplication rule P(A ∩ B) = P(A) × P(B), or equivalently P(A|B) = P(A).
For independent events, the probability of A and B is found by multiplying their probabilities.
Topics that use multiplication rule
- M: Probability (AQA A-Level)
- Probability (AS Unit 2: Applied Mathematics A) (WJEC A-Level)
Related terms
- addition rule
- Independent events
- mutually exclusive events
- Complement
- Conditional probability
- conditional probability formula
- Critiquing assumptions
- Effect on calculated probabilities
Using 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.
A week of Premium from your first lesson · Then the free plan continues · No card, no charge