0580/11 Oct/Nov 2021, Question 11: Averages from Frequency Tables
Cambridge IGCSE Mathematics 0580 · Paper 11 (Core) · Calculator · 3 marks
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The question, in short
Using a bar chart of scores out of 5 from 125 tasters, calculate the mean score.
Summarised in our own words. Use the official paper for the exact wording and the diagram.
Solution · 3 marks
- 1Σfx = 4 × 0 + 15 × 1 + 23 × 2 + 36 × 3 + 19 × 4 + 28 × 5
- 2= 0 + 15 + 46 + 108 + 76 + 140 = 385
- 3Mean = 385 ÷ 125 = 3.08
Answer3.08
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