EduSahara™ Worksheet

EduSahara™ Assignment

Name : Mean of Ungrouped Data

Chapter : Statistics

Grade : SSC Grade X

License : Non Commercial Use

Question 1

1.

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

Height (in cm)

133

134

135

136

139

143

144

153

No. of students

3

2

1

1

2

2

3

1

(i)

2089
15

cm
(ii)

2087
15

cm
(iii)

2117
15

cm
(iv)

2102
15

cm
(v)

696
5

cm

Question 2

2.

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

Height (in cm)

55

61

67

82

96

97

No. of plants

1

1

1

2

3

2

(i)

839
10

cm
(ii)

83

cm
(iii)

829
10

cm
(iv)

831
10

cm
(v)

849
10

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

3

6

2

5

6

8

(i)

391
30

years
(ii)

449
30

years
(iii)

419
30

years
(iv)

389
30

years
(v)

13

years

Question 4

4.

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

Score

72

73

74

75

76

80

84

No. of students

2

3

5

5

3

4

3

(i)

1933
25
(ii)

382
5
(iii)

1909
25
(iv)

1908
25
(v)

1958
25

Question 5

5.

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

Rainfall (in mm)

5

6

7

8

9

12

14

No. of days

3

4

2

4

3

1

3

(i)

42
5

mm
(ii)

83
10

mm
(iii)

103
10

mm
(iv)

93
10

mm
(v)

17
2

mm

Question 6

6.

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

Temperature (in degree C)

25

26

27

28

29

30

32

33

34

35

No. of days

2

2

1

4

1

5

3

3

2

2

(i)

753
25

°C
(ii)

803
25

°C
(iii)

754
25

°C
(iv)

151
5

°C
(v)

778
25

°C

Question 7

7.

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

Weight (in kg)

40

42

43

44

45

47

58

No. of students

2

4

4

1

4

3

2

(i)

901
20

kg
(ii)

903
20

kg
(iii)

451
10

kg
(iv)

921
20

kg
(v)

941
20

kg

Question 8

8.

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

Wage (in rupees)

315

353

381

390

395

400

444

449

475

No. of labourers

1

1

1

6

5

4

4

4

4

(i)

₹

414.67
(ii)

₹

414.53
(iii)

₹

416.53
(iv)

₹

415.53
(v)

₹

414.60

Question 9

9.

If the sum of the following frequency distribution is
20
,

find the value of 'x'.

Value

Frequency

4

1

5

3

7

2

8

4

9

2

10

x

11

2

12

3

13

1

(i)

3
(ii)

1
(iii)

4
(iv)

-1
(v)

2

Question 10

10.

If the mean of the following frequency distribution is
8

13
38
,

find the value of 'x'.

Value

Frequency

4

6

5

6

6

3

7

1

8

2

9

4

10

4

11

x

13

4

14

2

(i)

8
(ii)

6
(iii)

7
(iv)

5
(v)

3

Assignment Key