IGCSEMathsCambridge (CIE)CoreExam QuestionsStatisticsAverages & Range

Averages & Range (Cambridge (CIE) IGCSE Maths: Core)

Exam Questions

1 hour19 questions
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1
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Here are the weekly wages, in dollars, of the ten workers in an office.

280

200

175

1180

95

182

238

256

194

250

i) Find the median.

$ ................................................. [2]

ii) Calculate the mean.

$ ................................................. [2]

iii) For this office, explain why the mean is not a suitable average.

[1]

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2
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The table shows the maximum power, kW, and the time taken, in seconds, to accelerate from 0 to 100 km/h for each of 10 cars.

Maximum power (kW)

77

52

103

55

44

51

85

135

90

110

Time (seconds)

12.5

14.9

9.0

12.1

14.4

12.9

10.0

7.1

11.0

9.4

i) Find the range of the times.

........................................... s [1]

ii) Find the median maximum power.

........................................... kW [2]

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3
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Dina has a set of 12 cards. These are the numbers on the cards.

3

4

1

3

2

1

3

4

2

2

1

3

Work out

i) the median,

[2]

ii)the mode,

[1]

iii) the mean,

[2]

iv) the range.

[1]

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4a
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27

14

8

93

32

55

14

38

73

47

From this list of numbers find

the median,

[2]

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4b
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27

14

8

93

32

55

14

38

73

47

From this list of numbers find

the range.

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5a
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These are the number of texts sent one day by each of 10 students.

18

13

15

8

9

17

12

8

6

14

Write down the mode.

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5b
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Calculate the mean.

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6a
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Emma records the number of letters in each word in a sentence.

7

1

5

4

2

4

5

3

3

1

2

4

Find

i) the median,

[2]

ii) the mode,

[1]

iii) the range.

[1]

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6b
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Jack records the number of letters in 25 words.

Number of letters in a word

Number of words

1

3

2

1

3

5

4

8

5

6

6

2

i) Calculate the mean.

[3]

ii) Priti picks one of Jack’s words at random.

Find the probability that this word has 4 or more letters.

[2]

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7
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At Donville station the number of tickets sold each day is recorded for seven days.

104

18

72

31

27

45

60

Find

i) the range,

[1]

ii) the median,

[2]

iii) the mean.

[2]

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8
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The table shows the different methods of travel for 20 people going to work.

Method of travel

Frequency

Car

10

Walk

5

Bike

3

Bus

2

Which type of average, mean, median or mode, can be used for this information?

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1
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The table shows the temperature, in °C, at midday on the first day of each month during one year in a city.

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

9

11

15

19

23.5

27.5

29

28

25

19.5

14.5

10

Calculate the mean of these temperatures.

............................................. °C

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2
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Helena has a set of cards.

She takes one card at random and records the number shown. She does this 50 times.

The results are shown in the table.

Number on card

Frequency

1

8

2

11

3

10

4

9

5

12

Calculate the mean of her results.

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3
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Joel spins a fair five sides spinner numbered 2, 3, 4, 5, 6.

The table shows the results of his first 20 spins.

Number

2

3

4

5

6

Frequency

3

2

6

4

5

i) Write down the mode.

[1]

ii) Calculate the mean.

[3]

Joel wants to draw a pie chart to show the results in the table.

iiia) Show that the sector angle for the number 2 is 54°.

[1]

iiib) Find the sector angle for the number 6.

[2]

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4
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The table shows the number of bananas bought by the last 50 customers at a store.

Number of bananas bought

Frequency

0

14

1

0

2

2

3

5

4

11

5

8

6

10

i) Find the range.

[1]

ii) Work out the median.

[1]

iii)Calculate the mean.

[3]

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5
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The number of people in each of 150 cars entering the leisure centre car park is recorded. The table shows the results.

Number of people

1

2

3

4

5

Frequency

44

43

30

25

8

i) Write down the mode.

[1]

ii)Calculate the mean.

[3]

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1
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Ning has a spinner numbered 1 to 6. She spins it 50 times and her results are shown in the table.

Number on spinner

Frequency

1

15

2

12

3

9

4

5

5

2

6

7

i) Write down the mode.

[1]

ii) Find the median.

[1]

iii)Work out the mean.

[3]

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2
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The mean of seven numbers is 16.

Six of these numbers are 12, 20, 19, 10, 21 and 13.

Find the seventh number.

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3
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Six students bring an apple to school one day. The list shows the mass of each apple, correct to the nearest gram.

82

94

78

103

88

82

Find

ia) the mode,

.............................................. g [1]

ib)the range,

.............................................. g [1]

ic) the median.

.............................................. g [2]

ii)Another student, Toni, also brings an apple to school. The mean mass of the 7 apples is 89g.

Work out the mass of Toni’s apple.

.............................................. g [3]

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4
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The mean of three numbers is 150.

The numbers are 361, 2n and open parentheses n minus 1 close parentheses .

Find the value of n.

n = ................................................... 

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5
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Five numbers have a mean of 9.4 .
Four of the numbers are 3, 5, 10 and 12.

Work out the range of the five numbers.

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6
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The number of examinations that each of 196 candidates takes is recorded in the table.

Number of examinations

5

6

7

8

Number of candidates

27

42

63

64

i) Write down the range.

[1]

ii) Find the median.

[1]

iii)Calculate the mean.

[3]

iv)A candidate is selected at random. Find the probability that the candidate takes fewer than 8 examinations.

[2]

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