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0580/12 May/Jun 2022, Question 9: Pie Charts

Cambridge IGCSE Mathematics 0580 · Paper 12 (Core) · Calculator · 3 marks

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The question, in short

From a table of car colours and counts (Black 8, White 5, Silver 4, Red 3), find the red sector angle for a pie chart, then decide whether adding two white cars changes it.

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Part (a) · 2 marks

Calculate the sector angle representing the 3 red cars in the pie chart.

  1. 1Total cars = 8 + 5 + 4 + 3 = 20
  2. 2Red angle = 3/20 × 360 = 54°

Answer54

Part (b) · 1 mark

Decide whether the red sector angle changes after two white cars are added, giving a reason without further calculation.

  1. 1Red stays 3 but the total becomes 22, and 3/22 < 3/20
  2. 2Yes, because the proportion of red cars will be smaller

AnswerYes, because the proportion of red cars will be smaller

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Also searched as: 0580/12/M/J/22 · 0580_s22_qp_12 · 0580 s22 12 · question 9.
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