EduSahara™ Worksheet

EduSahara™ Assignment

Name : Mean of Ungrouped Data

Chapter : Statistics

Grade : SSC Grade X

License : Non Commercial Use

Question 1

1.

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

Height (in cm)

126

129

136

141

153

154

172

No. of students

1

1

1

3

2

1

1

(i)

723
5

cm
(ii)

145

cm
(iii)

733
5

cm
(iv)

724
5

cm
(v)

728
5

cm

Question 2

2.

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

Height (in cm)

50

62

66

77

80

87

88

90

No. of plants

1

1

1

3

2

3

3

1

(i)

79

cm
(ii)

1214
15

cm
(iii)

1199
15

cm
(iv)

1186
15

cm
(v)

1184
15

cm

Question 3

3.

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

Age (in years)

10

11

12

13

14

15

No. of students

4

5

4

4

4

9

(i)

223
15

years
(ii)

208
15

years
(iii)

194
15

years
(iv)

13

years
(v)

193
15

years

Question 4

4.

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

Score

71

73

75

76

77

78

82

83

90

No. of students

2

1

2

1

1

1

3

2

2

(i)

397
5
(ii)

401
5
(iii)

398
5
(iv)

406
5
(v)

396
5

Question 5

5.

Rainfall of 15 days are given below. Find the mean.

Rainfall (in mm)

8

9

10

12

14

15

No. of days

4

3

2

1

1

4

(i)

12

mm
(ii)

9

mm
(iii)

13

mm
(iv)

10

mm
(v)

11

mm

Question 6

6.

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

Temperature (in degree C)

25

26

30

32

35

No. of days

2

2

1

4

1

(i)

63
2

°C
(ii)

61
2

°C
(iii)

59
2

°C
(iv)

30

°C

Question 7

7.

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

Weight (in kg)

41

45

47

48

50

53

58

No. of students

1

1

2

4

3

1

3

(i)

50

kg
(ii)

751
15

kg
(iii)

764
15

kg
(iv)

749
15

kg
(v)

779
15

kg

Question 8

8.

Wages of 30 labourers are given below. Find the mean.

Wage (in rupees)

303

339

351

369

379

456

497

No. of labourers

5

3

4

4

3

4

7

(i)

₹

395.07
(ii)

₹

395.13
(iii)

₹

397.07
(iv)

₹

395.20
(v)

₹

396.07

Question 9

9.

If the sum of the following frequency distribution is
26
,

find the value of 'x'.

Value

Frequency

4

4

5

4

6

5

7

3

8

1

9

x

10

1

11

6

(i)

5
(ii)

3
(iii)

0
(iv)

1
(v)

2

Question 10

10.

If the mean of the following frequency distribution is
7

10
13
,

find the value of 'x'.

Value

Frequency

1

1

2

3

3

4

4

3

5

2

6

1

7

5

8

5

9

1

10

2

11

x

12

5

13

1

14

3

15

1

(i)

2
(ii)

5
(iii)

0
(iv)

3
(v)

1

Assignment Key