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0580/33 May/Jun 2026, Question 11: Bar Charts and Composite Bar Charts

Cambridge IGCSE Mathematics 0580 · Paper 33 (Core) · Calculator · 7 marks

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The question, in short

From a bar chart of study hours across five subjects totalling 40 hours, find the missing value and a percentage, then use a scatter diagram of study time against test scores for several tasks.

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

Part (ai) · 2 marks

Use the 40-hour total to work out Science hours, then draw that bar on the chart.

  1. 1Science = 40 − (6 + 12 + 10 + 7)
  2. 2= 40 − 35 = 5
  3. 3Draw a bar of height 5 above Science, same width as the others

AnswerBar drawn for Science with correct width and height 5 in correct position

Part (aii) · 1 mark

Calculate what percentage of the 40 hours is spent on geography.

  1. 1Geography = 12 hours
  2. 212/40 × 100 = 30%

Answer30

Part (bi) · 1 mark

Mark a point at 6 hours and 56 marks for Sam on the scatter diagram.

  1. 1Go across to 6 hours and up to 56
  2. 2Plot a cross at (6, 56)

AnswerPoint plotted at (6, 56)

Part (bii) · 1 mark

Count how many students scored above Sam's 56.

  1. 1Count the crosses above a score of 56
  2. 2Scores 60, 66, 66, 70, 82, 82, 92
  3. 37 people

Answer7

Part (biii) · 1 mark

Add a straight line of best fit through the plotted points.

  1. 1Rule a straight line following the trend of the points
  2. 2About as many points above as below the line
  3. 3e.g. through about (1.2, 24), (6, 54) and (10, 81)

AnswerCorrect ruled line of best fit, passing through (1.2, 18 to 30), (6, 50 to 58) and (10, 74 to 88)

Part (biv) · 1 mark

Using your line, estimate the score for 7 hours of study.

  1. 1Go up from 7 hours to the line of best fit
  2. 2Read across to the test score: about 60

Answer62 (accept 57 to 67)

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Also searched as: 0580/33/M/J/26 · 0580_s26_qp_33 · 0580 s26 33 · question 11.
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