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NSWMaths AdvancedQuick questions
Year 12: Statistical Analysis
Quick questions on Probability: sample space, complementary and compound events, tree diagrams, the addition and multiplication rules, independence and conditional probability
2short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is the multiplication rule along a tree?Show answer
A tree diagram lays out a multi-stage experiment one stage per column. The general multiplication rule is
What is conditional probability?Show answer
The conditional probability of given , written , is the probability of once you already know has occurred. Knowing shrinks the world to just the outcomes in , and you ask what fraction of that smaller world is also in :
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