4MA1/1H Jun 2025, Question 13: Interquartile range
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1H (Higher) · Calculator · 3 marks
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The question, in short
Find the interquartile range of: 9, 10, 12, 15, 17, 18, 19, 19, 20, 25, 26.
Summarised in our own words. Use the official paper for the exact wording and any diagrams.
Solution · 3 marks
- 1750 000 × 0.96 = 720 000
- 2720 000 × 0.935 = 673 200
- 3698 445 ÷ 673 200 = 1.0375
- 4Increase = 0.0375 = 3.75%
- 5x = 3.75
Answer3.75
Stuck on a step? Read the free lesson: Percentage Increases and Decreases
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