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NSWMaths Standard 2Quick questions
Year 11: Relative Frequency and Probability
Quick questions on Expected frequency 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 is the expected-frequency rule?Show answer
Every expected-frequency question reduces to filling in two slots in the same formula: the probability and the number of trials. Write the probability of the event as a fraction or decimal, write down how many trials there are, and multiply. There is no extra step. For a fair die rolled times the expected number of sixes is
What are working backwards to find the number of trials?Show answer
The same rule answers a different question: given the expected count, how many trials produce it? Start from
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