CAIE IGCSE Mathematics Extended E9.7.2 Calculate with frequency density

Practise using frequency density with histograms to find bar heights, frequencies, missing table values and estimated counts.

Syllabus
2028–2030
Objective
E9.7.2
Level
Extended

Exam points

  • calculate frequency density from frequency ÷ class width for each grouped interval
  • use histogram area, width × height, to find frequencies
  • use a total frequency to work out a missing bar height over a given interval

E9.7.2 Calculate with frequency density question 1

[Maximum number: 1]

Some apples are weighed and the mass, m grams, of each apple is recorded. The table shows the results.

Table for Question E9.7.2 Calculate with frequency density question 1 — CAIE IGCSE Mathematics Extended

The histogram shows some of the information from the table.

Figure for Question E9.7.2 Calculate with frequency density question 1 — CAIE IGCSE Mathematics Extended

Work out the value of x.
x=

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