CAIE IGCSE Mathematics Core C9.3 Averages and Range Topic Practice

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Covered syllabus points

C9.3.1 Calculate the mean, median, mode and range for individual data and

Question 1

[Maximum number: 3]

The stem-and-leaf diagram shows the scores of each of 27 students in a test.

Table for Question 1 — CAIE IGCSE Mathematics Core

Key: 2|8 represents a score of 28

Question (a)

(a)

Find the range of the scores.

[ 1 ]

Question (b)

(b)

When the score for another student is included in the diagram the new range is 38.
Find the two possible scores for this student.

[ 2 ]

Question 2

[Maximum number: 3]

In a quiz, the mean score of each of 12 adults is 43.25 .
In the same quiz, the mean score of each of 16 children is 39.75 .
Calculate the mean score of the 28 people.

Question 3

[Maximum number: 3]

Question (a)

(a)

The table shows the diameter, in centimetres, and the mass, in grams, of nine medals.

Table for Question (a) — CAIE IGCSE Mathematics Core
[ 3 ]

Question (i)

(i)

Write down the mode of the diameters.
cm [1]

[ 1 ]

Question (ii)

(ii)

Find the median of the masses.
g [2]

[ 2 ]
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