Mathematics 4024 · O Level · Ratio and proportion

Ratio and proportion — practice question

Lamps are manufactured in a factory. A random sample of 50 lamps is checked, and 4 are found to be faulty. In one day, 4000 lamps are produced.
(main)[2]

Calculate how many of the 4000 lamps would be expected to be faulty.

Worked solution & mark scheme

This 2-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Apply $\frac{4}{50}\times 4000$” …

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