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0580/32 May/Jun 2025, Question 12: Pie Charts

Cambridge IGCSE Mathematics 0580 · Paper 32 (Core) · Calculator · 7 marks

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The question, in short

Combine data from a partially drawn bar chart (Biology 9, Physics 7) and a pie chart with a 120° Chemistry sector to finish both charts, then state a benefit of bar charts over pie charts.

Summarised in our own words. Use the official paper for the exact wording and the diagram.

Part (ai) · 2 marks

Using the pie chart's Chemistry sector of 120°, work out the missing Chemistry bar height and draw it on the bar chart.

  1. 1Chemistry sector 120° = 120/360 = 1/3 of the students
  2. 2So Biology + Physics = 9 + 7 = 16 students = 2/3 of the total
  3. 3Chemistry = 16 ÷ 2 = 8 students
  4. 4Draw the Chemistry bar to height 8

AnswerBar for Chemistry drawn height 8

Part (aii) · 4 marks

Using the bar chart's Biology 9 and Physics 7, find the angles for those sectors and complete the pie chart.

  1. 1Total = 8 + 9 + 7 = 24 students, so each student = 360 ÷ 24 = 15°
  2. 2Biology = 9 × 15 = 135°
  3. 3Physics = 7 × 15 = 105°
  4. 4Draw sectors of 135° (Biology) and 105° (Physics) next to the 120° Chemistry sector

AnswerPie chart correctly drawn

Part (b) · 1 mark

State one reason why reading results is easier from a bar chart than from a pie chart.

  1. 1A bar chart shows the actual frequencies, whereas a pie chart only shows the proportions

AnswerBar chart gives the frequencies whereas pie chart only gives proportions

Stuck on a step? Read the free lesson: Pie Charts

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Also searched as: 0580/32/M/J/25 · 0580_s25_qp_32 · 0580 s25 32 · question 12.
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