4024/22 Oct/Nov 2025, Question 11: Relative Frequency and Expectation
Cambridge O Level Mathematics 4024 · Paper 22 (Calculator) · Calculator · 2 marks
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The question, in short
A batch of 2000 batteries contains 28 faulty ones. Using this rate, calculate how many faulty batteries are expected in a production run of 125 000.
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Solution · 2 marks
- 1Fraction faulty = 28/2000
- 2Expected faulty = 28/2000 × 125 000 = 1750
Answer1750
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