EduSahara™ Worksheet

EduSahara™ Assignment

Name : Mean of Frequency Distribution

Chapter : Statistics

Grade : ICSE Grade VIII

License : Non Commercial Use

Question 1

1.

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

Height (in cm)

125

127

130

135

138

149

157

163

171

174

No. of students

1

2

1

3

3

2

1

5

5

2

(i)

3803
25

cm
(ii)

3826
25

cm
(iii)

3801
25

cm
(iv)

3851
25

cm
(v)

3802
25

cm

Question 2

2.

Heights of 20 plants are given below. Find the mean.

Height (in cm)

57

62

64

72

73

77

88

91

93

No. of plants

1

3

2

1

4

2

3

1

3

(i)

1523
20

cm
(ii)

1543
20

cm
(iii)

381
5

cm
(iv)

305
4

cm
(v)

1563
20

cm

Question 3

3.

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

Age (in years)

10

11

12

13

14

No. of students

2

2

3

6

2

(i)

184
15

years
(ii)

214
15

years
(iii)

62
5

years
(iv)

199
15

years
(v)

37
3

years

Question 4

4.

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

Score

70

71

72

77

78

79

82

83

85

88

90

No. of students

4

4

3

3

2

3

4

1

3

2

1

(i)

1168
15
(ii)

1183
15
(iii)

1198
15
(iv)

78
(v)

1169
15

Question 5

5.

Rainfall of 25 days are given below. Find the mean.

Rainfall (in mm)

5

6

7

8

9

11

12

13

14

15

No. of days

1

2

2

1

4

1

1

5

5

3

(i)

278
25

mm
(ii)

303
25

mm
(iii)

328
25

mm
(iv)

279
25

mm
(v)

56
5

mm

Question 6

6.

Temperatures of 30 days are given below. Find the mean.

Temperature (in degree C)

25

27

29

30

31

32

34

35

No. of days

2

4

4

4

3

4

3

6

(i)

31

°C
(ii)

329
10

°C
(iii)

311
10

°C
(iv)

309
10

°C
(v)

319
10

°C

Question 7

7.

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

Weight (in kg)

42

44

45

46

48

50

52

55

56

57

58

No. of students

2

4

4

2

2

1

1

1

4

4

5

(i)

509
10

kg
(ii)

511
10

kg
(iii)

519
10

kg
(iv)

51

kg
(v)

529
10

kg

Question 8

8.

Wages of 10 labourers are given below. Find the mean.

Wage (in rupees)

302

313

318

378

482

No. of labourers

2

2

1

2

3

(i)

₹

374.00
(ii)

₹

373.00
(iii)

₹

376.00
(iv)

₹

377.00
(v)

₹

375.00

Question 9

9.

If the mean of the following frequency distribution is
9

23
37
,

find the value of 'x'.

Value

Frequency

2

1

3

1

4

2

5

4

6

3

7

1

8

1

9

2

10

5

11

3

12

x

13

7

14

1

15

4

(i)

1
(ii)

2
(iii)

3
(iv)

0
(v)

4

Question 10

10.

If the sum of the following frequency distribution is
30
,

find the value of 'x'.

Value

Frequency

1

7

2

x

3

1

5

2

6

5

7

3

8

5

9

1

10

3

(i)

6
(ii)

0
(iii)

4
(iv)

2
(v)

3

Assignment Key