EduSahara™ Worksheet

EduSahara™ Assignment

Name : Mean of Frequency Distribution

Chapter : Statistics

Grade : ICSE Grade VII

License : Non Commercial Use

Question 1

1.

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

Height (in cm)

125

141

153

168

169

175

No. of students

1

2

3

1

2

1

(i)

1549
10

cm
(ii)

1547
10

cm
(iii)

774
5

cm
(iv)

1557
10

cm
(v)

1567
10

cm

Question 2

2.

Heights of 30 plants are given below. Find the mean.

Height (in cm)

52

54

63

65

66

72

74

78

99

No. of plants

1

4

5

3

3

1

4

6

3

(i)

713
10

cm
(ii)

141
2

cm
(iii)

352
5

cm
(iv)

703
10

cm
(v)

723
10

cm

Question 3

3.

Ages of 20 students are given below. Find the mean.

Age (in years)

10

11

12

13

14

15

No. of students

1

2

4

2

4

7

(i)

287
20

years
(ii)

67
5

years
(iii)

307
20

years
(iv)

269
20

years
(v)

267
20

years

Question 4

4.

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

Score

72

74

76

77

79

84

86

No. of students

3

2

4

7

5

5

4

(i)

79
(ii)

1183
15
(iii)

1213
15
(iv)

1198
15
(v)

1184
15

Question 5

5.

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

Rainfall (in mm)

7

8

9

11

12

13

14

No. of days

1

1

1

2

2

1

2

(i)

121
10

mm
(ii)

113
10

mm
(iii)

131
10

mm
(iv)

111
10

mm
(v)

56
5

mm

Question 6

6.

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

Temperature (in degree C)

25

26

27

28

29

32

33

35

No. of days

5

2

7

3

4

2

5

2

(i)

175
6

°C
(ii)

179
6

°C
(iii)

29

°C
(iv)

185
6

°C
(v)

173
6

°C

Question 7

7.

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

Weight (in kg)

46

48

49

50

52

53

55

56

57

No. of students

6

1

2

5

2

6

3

2

3

(i)

257
5

kg
(ii)

259
5

kg
(iii)

262
5

kg
(iv)

267
5

kg
(v)

258
5

kg

Question 8

8.

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

Wage (in rupees)

355

393

439

486

488

496

No. of labourers

4

2

1

1

1

1

(i)

₹

413.50
(ii)

₹

412.50
(iii)

₹

412.00
(iv)

₹

411.50

Question 9

9.

If the sum of the following frequency distribution is
38
,

find the value of 'x'.

Value

Frequency

2

4

3

x

4

3

5

5

6

2

8

5

9

4

10

1

11

4

12

4

13

3

14

2

(i)

-2
(ii)

3
(iii)

1
(iv)

2
(v)

0

Question 10

10.

If the mean of the following frequency distribution is
7

19
32
,

find the value of 'x'.

Value

Frequency

1

2

2

1

3

3

4

1

5

2

6

x

7

2

8

3

9

5

10

3

11

5

12

3

(i)

4
(ii)

0
(iii)

1
(iv)

2
(v)

3

Assignment Key