4024/11 May/Jun 2022, Question 11: Basic Probability
Cambridge O Level Mathematics 4024 · Paper 11 (Non-calculator) · Non-calculator · 2 marks
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The question, in short
From a survey of 100 adults' car colours, find the relative frequency of blue cars, and from a separate group of 1200 adults with white-car relative frequency 0.3, find how many own white cars.
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Part (a) · 1 mark
Using the frequency table for 100 adults, state the relative frequency for the blue category.
- 1Relative frequency of blue = 23/100
Answer23/100
Part (b) · 1 mark
For 1200 adults, given the white-car relative frequency is 0.3, work out how many of them have white cars.
- 10.3 × 1200 = 360
Answer360
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