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NSWMaths Standard 2Quick questions
Year 11: Relative Frequency and Probability
Quick questions on Theoretical probability and sample spaces for HSC Maths Standard 2
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 are equally likely outcomes?Show answer
The formula only works when every outcome in the sample space has the same chance of happening. A fair die, a fair coin, a well-shuffled pack and an evenly divided spinner all produce equally likely outcomes, which is why they appear so often in exam questions. The word "fair", "unbiased", "normal" or "at random" in a question is your signal that the outcomes are equally likely and the formula applies.
What is listing outcomes systematically?Show answer
Counting goes wrong when the list is haphazard. Work to a system so the list is complete and nothing repeats:
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