O-LevelMathematicsStatistics4024/22 · Oct/Nov 2025 · Q112 Marks

A factory makes batteries. A batch of 2000 batteries are tested and 28 are found to be faulty. The factory makes 125000 batteries. Calculate the number of these 125000 batteries that are expected to be faulty.

A factory makes batteries. A batch of 2000 batteries are tested and 28 are found to be faulty. The factory makes 125000 batteries. Calculate the number of these 125000 batteries that are expected to be faulty.[2]

Mark scheme

Marking points from the official mark scheme (Oct/Nov 2025). The mark or mark type is shown in brackets.

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Topic: Statistics, O-Level Mathematics (syllabus 4024). Structured question, 2 marks.
Source: O-Level Mathematics, Oct/Nov 2025 Paper 2 Variant 2, question 11.

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