4024/11 May/Jun 2020, Question 14: Relative Frequency and Expectation
Cambridge O Level Mathematics 4024 · Paper 11 (Non-calculator) · Non-calculator · 3 marks
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The question, in short
From a survey of 300 students with relative frequencies given for Classical, Folk and Rock, find how many students chose Reggae.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Solution · 3 marks
- 1Relative frequency of Reggae = 1 − (0.15 + 0.22 + 0.39)
- 2= 1 − 0.76 = 0.24
- 3Number choosing Reggae = 0.24 × 300 = 72
Answer72
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