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)

125

126

137

154

157

169

171

No. of students

5

1

1

2

2

3

1

(i)

2218
15

cm
(ii)

2203
15

cm
(iii)

2188
15

cm
(iv)

146

cm
(v)

2189
15

cm

Question 2

2.

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

Height (in cm)

58

63

71

78

90

93

97

100

No. of plants

2

1

1

3

1

2

3

2

(i)

427
5

cm
(ii)

419
5

cm
(iii)

417
5

cm
(iv)

422
5

cm
(v)

418
5

cm

Question 3

3.

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

Age (in years)

10

11

12

13

14

15

No. of students

3

1

4

3

4

5

(i)

13

years
(ii)

279
20

years
(iii)

261
20

years
(iv)

299
20

years
(v)

259
20

years

Question 4

4.

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

Score

71

72

77

80

83

86

87

90

No. of students

2

6

4

1

6

3

3

5

(i)

2459
30
(ii)

2429
30
(iii)

81
(iv)

2489
30
(v)

2431
30

Question 5

5.

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

Rainfall (in mm)

5

6

7

9

15

No. of days

1

3

2

1

3

(i)

46
5

mm
(ii)

93
10

mm
(iii)

101
10

mm
(iv)

91
10

mm
(v)

111
10

mm

Question 6

6.

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

Temperature (in degree C)

25

29

30

31

32

33

34

35

No. of days

2

3

2

3

1

1

2

1

(i)

488
15

°C
(ii)

92
3

°C
(iii)

473
15

°C
(iv)

153
5

°C
(v)

458
15

°C

Question 7

7.

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

Weight (in kg)

40

42

45

47

50

51

55

56

No. of students

6

3

6

1

2

4

2

1

(i)

1178
25

kg
(ii)

1153
25

kg
(iii)

1203
25

kg
(iv)

1154
25

kg
(v)

231
5

kg

Question 8

8.

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

Wage (in rupees)

345

363

384

399

422

450

455

No. of labourers

5

3

2

1

3

6

5

(i)

₹

409.88
(ii)

₹

410.88
(iii)

₹

408.88
(iv)

₹

408.96
(v)

₹

408.92

Question 9

9.

If the sum of the following frequency distribution is
30
,

find the value of 'x'.

Value

Frequency

4

4

5

6

6

5

7

x

8

2

9

9

10

1

(i)

1
(ii)

6
(iii)

2
(iv)

4
(v)

3

Question 10

10.

If the mean of the following frequency distribution is
7

27
40
,

find the value of 'x'.

Value

Frequency

5

6

6

9

7

6

8

6

9

x

10

4

11

6

(i)

3
(ii)

4
(iii)

2
(iv)

6
(v)

0

Assignment Key