EduSahara™ Worksheet

EduSahara™ Assignment

Name : Mean of Ungrouped Data

Chapter : Statistics

Grade : SSC Grade X

License : Non Commercial Use

Question 1

1.

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

Height (in cm)

127

136

137

143

145

153

154

157

164

167

168

175

No. of students

1

1

1

1

2

4

2

2

4

1

2

4

(i)

3951
25

cm
(ii)

3976
25

cm
(iii)

3926
25

cm
(iv)

3928
25

cm
(v)

3927
25

cm

Question 2

2.

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

Height (in cm)

50

51

56

65

67

69

73

74

83

85

90

No. of plants

1

1

3

3

2

4

1

1

5

1

3

(i)

1816
25

cm
(ii)

1841
25

cm
(iii)

1791
25

cm
(iv)

1793
25

cm
(v)

1792
25

cm

Question 3

3.

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

Age (in years)

10

11

12

13

14

15

No. of students

2

2

1

5

2

3

(i)

69
5

years
(ii)

74
5

years
(iii)

13

years
(iv)

66
5

years
(v)

64
5

years

Question 4

4.

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

Score

73

76

79

84

86

No. of students

5

1

1

2

1

(i)

388
5
(ii)

387
5
(iii)

392
5
(iv)

389
5
(v)

397
5

Question 5

5.

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

Rainfall (in mm)

5

7

8

9

10

12

13

14

15

No. of days

4

6

4

4

5

1

1

4

1

(i)

48
5

mm
(ii)

56
5

mm
(iii)

47
5

mm
(iv)

46
5

mm
(v)

51
5

mm

Question 6

6.

Temperatures of 20 days are given below. Find the mean.

Temperature (in degree C)

25

26

28

29

30

31

32

34

35

No. of days

2

2

2

3

4

2

1

3

1

(i)

154
5

°C
(ii)

149
5

°C
(iii)

159
5

°C
(iv)

30

°C
(v)

151
5

°C

Question 7

7.

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

Weight (in kg)

47

48

50

51

52

56

57

59

No. of students

1

1

1

1

1

1

3

1

(i)

272
5

kg
(ii)

268
5

kg
(iii)

267
5

kg
(iv)

269
5

kg
(v)

277
5

kg

Question 8

8.

Wages of 25 labourers are given below. Find the mean.

Wage (in rupees)

308

312

327

328

353

367

393

428

468

486

No. of labourers

2

1

1

1

3

3

4

4

4

2

(i)

₹

395.84
(ii)

₹

394.84
(iii)

₹

394.88
(iv)

₹

396.84
(v)

₹

394.92

Question 9

9.

If the sum of the following frequency distribution is
30
,

find the value of 'x'.

Value

Frequency

4

2

5

1

6

3

7

x

8

2

9

1

10

1

11

7

12

1

13

4

14

3

(i)

4
(ii)

3
(iii)

6
(iv)

7
(v)

5

Question 10

10.

If the mean of the following frequency distribution is
7

16
23
,

find the value of 'x'.

Value

Frequency

2

2

3

x

4

2

5

1

6

1

7

3

8

2

9

1

10

3

11

3

13

3

(i)

1
(ii)

-1
(iii)

3
(iv)

5
(v)

2

Assignment Key