[Higher only] Use the product rule for counting where the specification requires it.

[Higher only] Use the product rule for counting where the specification requires it.. Within Structure and calculation, this learning objective sits inside Systematic listing and counting for AQA Mathematics 8300. Focus on using ideas such as product rule, counting accurately in your explanation. A strong response should define the core idea, describe the relevant calculation, reasoning, representation, and interpretation, and connect it back to the question wording instead of giving a vague definition. When revising, students should aim to explain the subject clearly, include precise precise mathematical notation and terminology, and show how the idea links to the wider topic rather than listing isolated facts.