EduSahara™ Worksheet

EduSahara™ Assignment

Name : Mean of Ungrouped Data

Chapter : Statistics

Grade : SSC Grade X

License : Non Commercial Use

Question 1

1.

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

Height (in cm)

127

133

141

142

147

152

154

169

No. of students

1

9

3

4

5

4

2

2

(i)

718
5

cm
(ii)

2182
15

cm
(iii)

2152
15

cm
(iv)

2153
15

cm
(v)

2167
15

cm

Question 2

2.

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

Height (in cm)

51

67

68

80

83

85

92

No. of plants

4

5

5

1

4

2

4

(i)

1831
25

cm
(ii)

1854
25

cm
(iii)

1829
25

cm
(iv)

366
5

cm
(v)

1879
25

cm

Question 3

3.

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

Age (in years)

11

12

13

15

No. of students

2

2

3

3

(i)

11

years
(ii)

13

years
(iii)

12

years
(iv)

15

years
(v)

14

years

Question 4

4.

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

Score

72

73

74

76

77

79

81

83

87

90

No. of students

2

3

1

2

2

5

4

3

1

2

(i)

1979
25
(ii)

1978
25
(iii)

2003
25
(iv)

396
5
(v)

2028
25

Question 5

5.

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

Rainfall (in mm)

6

8

9

13

14

15

No. of days

3

2

2

5

1

2

(i)

191
15

mm
(ii)

176
15

mm
(iii)

163
15

mm
(iv)

54
5

mm
(v)

161
15

mm

Question 6

6.

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

Temperature (in degree C)

26

27

28

29

31

32

33

34

No. of days

2

4

2

2

4

1

3

2

(i)

617
20

°C
(ii)

599
20

°C
(iii)

637
20

°C
(iv)

299
10

°C
(v)

597
20

°C

Question 7

7.

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

Weight (in kg)

41

42

43

50

52

No. of students

2

3

5

2

3

(i)

136
3

kg
(ii)

679
15

kg
(iii)

227
5

kg
(iv)

694
15

kg
(v)

709
15

kg

Question 8

8.

Wages of 15 labourers are given below. Find the mean.

Wage (in rupees)

325

417

465

474

485

497

No. of labourers

3

4

3

1

1

3

(i)

₹

432.60
(ii)

₹

432.53
(iii)

₹

433.53
(iv)

₹

434.53
(v)

₹

432.67

Question 9

9.

If the sum of the following frequency distribution is
26
,

find the value of 'x'.

Value

Frequency

2

4

4

4

5

1

6

1

7

3

8

4

9

1

11

4

13

3

14

x

(i)

4
(ii)

0
(iii)

2
(iv)

1
(v)

-2

Question 10

10.

If the mean of the following frequency distribution is
7

17
22
,

find the value of 'x'.

Value

Frequency

2

1

3

2

4

3

5

x

6

1

7

1

8

2

9

2

10

2

11

6

13

1

(i)

3
(ii)

2
(iii)

1
(iv)

-1
(v)

0

Assignment Key