0580/12 May/Jun 2026, Question 24: Mean, Median, Mode and Range
Cambridge IGCSE Mathematics 0580 · Paper 12 (Core) · Non-calculator · 3 marks
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The question, in short
Four children have mean age 11; a fifth child joins and the mean becomes 10. Calculate the age of the fifth child.
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Solution · 3 marks
- 1Total age of 4 children = 4 × 11 = 44
- 2Total age of 5 children = 5 × 10 = 50
- 3Fifth child = 50 − 44 = 6 years
Answer6
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