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4024/22 May/Jun 2025, Question 6: Relative Frequency and Expectation

Cambridge O Level Mathematics 4024 · Paper 22 (Calculator) · Calculator · 3 marks

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The question, in short

Using a table of relative frequencies for movie preferences, find the missing relative frequency for Thriller and the number of students choosing Science Fiction out of 500.

Summarised in our own words. Use the official paper for the exact wording and any diagrams.

Part (a) · 2 marks

Calculate the relative frequency for Thriller, given the other relative frequencies in the table.

  1. 1Relative frequencies add to 1
  2. 2Thriller = 1 − (0.1 + 0.3 + 0.35)
  3. 3= 1 − 0.75 = 0.25

Answer0.25 or 1/4 or 25%

Part (b) · 1 mark

Calculate how many of the 500 students choose Science Fiction, using its relative frequency.

  1. 10.35 × 500 = 175

Answer175

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Also searched as: 4024/22/M/J/25 · 4024_s25_qp_22 · 4024 s25 22 · question 6.
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