EduSahara™ Worksheet

EduSahara™ Assignment

Name : Mean of Ungrouped Data

Chapter : Statistics

Grade : SSC Grade X

License : Non Commercial Use

Question 1

1.

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

Height (in cm)

129

131

132

134

136

141

143

145

151

153

154

160

No. of students

4

1

1

1

1

1

2

1

2

2

3

1

(i)

2891
20

cm
(ii)

2851
20

cm
(iii)

2853
20

cm
(iv)

2871
20

cm
(v)

713
5

cm

Question 2

2.

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

Height (in cm)

61

67

68

89

90

92

97

No. of plants

2

3

5

3

6

4

2

(i)

2082
25

cm
(ii)

2034
25

cm
(iii)

2032
25

cm
(iv)

2033
25

cm
(v)

2057
25

cm

Question 3

3.

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

Age (in years)

10

11

12

13

14

15

No. of students

3

3

4

2

9

4

(i)

13

years
(ii)

323
25

years
(iii)

348
25

years
(iv)

373
25

years
(v)

324
25

years

Question 4

4.

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

Score

71

81

83

86

87

89

90

No. of students

3

1

2

3

2

5

4

(i)

1699
20
(ii)

1717
20
(iii)

1697
20
(iv)

1737
20
(v)

849
10

Question 5

5.

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

Rainfall (in mm)

5

7

8

9

10

11

12

13

14

15

No. of days

3

3

1

3

1

3

1

1

2

2

(i)

199
20

mm
(ii)

217
20

mm
(iii)

197
20

mm
(iv)

237
20

mm
(v)

99
10

mm

Question 6

6.

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

Temperature (in degree C)

25

26

27

28

29

34

No. of days

2

5

2

2

2

2

(i)

431
15

°C
(ii)

416
15

°C
(iii)

446
15

°C
(iv)

418
15

°C
(v)

139
5

°C

Question 7

7.

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

Weight (in kg)

42

43

44

45

46

47

52

56

58

No. of students

2

2

1

1

2

3

4

2

3

(i)

493
10

kg
(ii)

503
10

kg
(iii)

247
5

kg
(iv)

99
2

kg
(v)

513
10

kg

Question 8

8.

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

Wage (in rupees)

336

347

360

386

416

460

463

472

485

No. of labourers

2

5

3

3

3

8

1

2

3

(i)

₹

416.50
(ii)

₹

415.00
(iii)

₹

414.50
(iv)

₹

415.50

Question 9

9.

If the sum of the following frequency distribution is
21
,

find the value of 'x'.

Value

Frequency

5

2

6

x

7

3

8

1

9

3

10

7

12

3

(i)

3
(ii)

5
(iii)

-1
(iv)

2
(v)

1

Question 10

10.

If the mean of the following frequency distribution is
8

14
33
,

find the value of 'x'.

Value

Frequency

3

4

4

1

5

3

6

6

7

1

8

1

9

3

10

4

12

x

13

3

14

3

(i)

4
(ii)

3
(iii)

7
(iv)

5
(v)

2

Assignment Key