EduSahara™ Worksheet

EduSahara™ Assignment

Name : Mean of Frequency Distribution

Chapter : Statistics

Grade : ICSE Grade VII

License : Non Commercial Use

Question 1

1.

Heights of 15 students are given below. Find the mean.

Height (in cm)

131

134

139

143

152

156

162

163

170

No. of students

3

1

2

1

1

1

3

2

1

(i)

748
5

cm
(ii)

751
5

cm
(iii)

756
5

cm
(iv)

747
5

cm
(v)

746
5

cm

Question 2

2.

Heights of 25 plants are given below. Find the mean.

Height (in cm)

53

57

59

62

71

76

77

84

90

No. of plants

3

4

3

2

5

3

1

2

2

(i)

1746
25

cm
(ii)

1696
25

cm
(iii)

1697
25

cm
(iv)

1721
25

cm
(v)

1698
25

cm

Question 3

3.

Ages of 10 students are given below. Find the mean.

Age (in years)

10

11

12

13

14

15

No. of students

2

3

2

1

1

1

(i)

119
10

years
(ii)

139
10

years
(iii)

12

years
(iv)

129
10

years
(v)

121
10

years

Question 4

4.

Scores of 25 students are given below. Find the mean.

Score

70

73

74

76

79

82

83

84

86

89

90

No. of students

4

2

1

3

2

2

2

1

1

4

3

(i)

2013
25
(ii)

2014
25
(iii)

2012
25
(iv)

2037
25
(v)

2062
25

Question 5

5.

Rainfall of 10 days are given below. Find the mean.

Rainfall (in mm)

9

10

11

12

13

14

No. of days

2

2

1

2

2

1

(i)

113
10

mm
(ii)

133
10

mm
(iii)

123
10

mm
(iv)

23
2

mm
(v)

57
5

mm

Question 6

6.

Temperatures of 10 days are given below. Find the mean.

Temperature (in degree C)

25

26

28

29

31

32

34

35

No. of days

2

1

2

1

1

1

1

1

(i)

59
2

°C
(ii)

303
10

°C
(iii)

293
10

°C
(iv)

313
10

°C
(v)

147
5

°C

Question 7

7.

Weights of 30 students are given below. Find the mean.

Weight (in kg)

40

43

45

47

48

49

52

56

58

No. of students

1

3

3

4

3

4

3

3

6

(i)

767
15

kg
(ii)

754
15

kg
(iii)

251
5

kg
(iv)

782
15

kg
(v)

752
15

kg

Question 8

8.

Wages of 20 labourers are given below. Find the mean.

Wage (in rupees)

317

347

356

385

481

482

No. of labourers

3

1

3

6

5

2

(i)

₹

402.25
(ii)

₹

403.25
(iii)

₹

402.50
(iv)

₹

404.25
(v)

₹

402.75

Question 9

9.

If the sum of the following frequency distribution is
40
,

find the value of 'x'.

Value

Frequency

3

2

4

3

5

6

6

2

7

x

8

4

9

1

10

5

11

6

12

9

(i)

0
(ii)

4
(iii)

2
(iv)

3
(v)

1

Question 10

10.

If the mean of the following frequency distribution is
5

15
19
,

find the value of 'x'.

Value

Frequency

1

6

2

5

3

1

4

1

5

2

6

6

7

4

8

1

9

x

10

5

11

1

(i)

7
(ii)

5
(iii)

3
(iv)

8
(v)

6

Assignment Key