CAIE IGCSE Mathematics Extended E9.7.2 Calculate with Frequency Density Questions

Practise Extended CAIE IGCSE Mathematics by using frequency density, class width and bar area to construct and interpret unequal-width histograms.

Exam points

Calculate frequency density as frequency divided by class width for grouped continuous data.
Use frequency density, class width and bar area to calculate missing frequencies or histogram heights.
Interpret and construct histograms with unequal class intervals, correct widths, scales and units.

[Maximum number: 3]

The table shows some information about the mass of each of 200 oranges.

Sarah draws a histogram to show this information.

The table shows the height of one of the bars for this histogram.
Complete the table.

$0.8 \quad 3.2 \quad 1$

B2 for two correct
or B1 for one correct
or M1 for three of 1.6, 6.4, 14.8 and 2
seen

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