EduSahara™ Worksheet

Question 1

1.

Convert the exclusive form of the class interval 47.5 - 56.5 to inclusive form

(i)

47.5

-

56
(ii)

48

-

56.5
(iii)

48.5

-

55.5
(iv)

47.5

-

56.5
(v)

48

-

56

Question 2

2.

Wages of 11 labourers are given below. Find the mode.

Wage (in rupees)

381

393

431

497

500

No. of labourers

2

4

2

1

2

(i)

₹

394.00
(ii)

₹

391.00
(iii)

₹

392.00
(iv)

₹

395.00
(v)

₹

393.00

Question 3

3.

The marks obtained by 12 students in a test are given below. Find their mode marks.

5

42

33

32

44

48

44

44

19

34

22

27

(i)

44
(ii)

43
(iii)

45
(iv)

42
(v)

47

Question 4

4.

Rainfall of 15 days (in mm) are given below. Find the median rainfall.

14

12

13

12

10

10

9

5

6

13

11

5

11

9

6

(i)

12

mm
(ii)

9

mm
(iii)

8

mm
(iv)

10

mm
(v)

11

mm

Question 5

5.

On a certain day, the temperature in a city was recorded as shown below. Find the time that has 11 °C temperature.

(i)

1 p.m.
(ii)

11 a.m.
(iii)

9 a.m.
(iv)

3 p.m.
(v)

5 a.m.

Question 6

6.

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

Rainfall (in mm)

5

6

7

8

12

13

14

15

No. of days

2

1

6

1

2

4

3

1

(i)

8

mm
(ii)

9

mm
(iii)

12

mm
(iv)

10

mm
(v)

11

mm

Question 7

7.

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

Weight (in kg)

41

43

45

46

48

49

59

60

No. of students

1

3

5

4

2

2

1

2

(i)

48

kg
(ii)

46

kg
(iii)

45

kg
(iv)

44

kg
(v)

47

kg

Question 8

8.

The observations of an ungrouped data are
x

1
,
x

2
,
x

3
and
x

1
<
x

2
<
x

3
.

(i)
20

,

32

,

100
(ii)
16

,

32

,

96
(iii)
32

,

32

,

192
(iv)
18

,

32

,

98

Question 9

9.

A frequency distribution table is given below.
Find the
mean .

Class-Interval

11 - 16

16 - 21

21 - 26

26 - 31

31 - 36

36 - 41

41 - 46

Frequency

29

45

34

5

2

5

20

(i)

687
28
(ii)

715
28
(iii)

165
7
(iv)

659
28
(v)

661
28

Question 10

10.

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

Height (in cm)

50

57

59

64

66

67

87

98

99

No. of plants

4

3

3

2

2

3

1

2

5

(i)

1788
25

cm
(ii)

1837
25

cm
(iii)

1787
25

cm
(iv)

1789
25

cm
(v)

1812
25

cm

Question 11

11.

The arithmetic mean of
21

27

26

12

26

25

11
is

(i)

19.14
(ii)

23.14
(iii)

21.14
(iv)

20.14
(v)

22.14

Question 12

12.

Heights of 13 plants (in cm) are given below. Find the mean height.

72

76

50

81

76

89

79

72

65

61

87

55

80

(i)

956
13

cm
(ii)

969
13

cm
(iii)

945
13

cm
(iv)

944
13

cm
(v)

943
13

cm

Question 13

13.

Find the median of the first 10 even numbers.

(i)

11
(ii)

10
(iii)

8
(iv)

12
(v)

14

Question 14

14.

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

Height (in cm)

132

146

150

151

172

173

No. of students

6

4

5

1

6

3

(i)

3829
25

cm
(ii)

3853
25

cm
(iii)

3828
25

cm
(iv)

3878
25

cm
(v)

766
5

cm

Question 15

15.

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

Score

71

72

73

74

75

79

80

83

No. of students

2

2

1

2

3

1

2

2

(i)

74
(ii)

75
(iii)

76
(iv)

77
(v)

73

Question 16

16.

The following table gives the data regarding
the favourite sport of
160
students of a school.
Find number of students who like
long jump
.
Sport

football

cricket

chess

long jump

wrestling

basketball

swimming

No. of Students

10

11

31

36

14

34

24

(i)

37
(ii)

36
(iii)

35
(iv)

34
(v)

38

Question 17

17.

Which of the following class intervals are in exclusive form?

a)	30 - 36 , 36 - 42 , 42 - 48...
b)	12 - 18 , 19 - 25 , 26 - 32,...
c)	11.5 - 18.5 , 18.5 - 25.5 , 25.5 - 32.5...
d)	33 - 39 , 40 - 46 , 47 - 53,...
e)	12 - 18 , 18 - 24 , 24 - 30,...

(i)

{b,a,c}
(ii)

{b,d,e}
(iii)

{a,c,e}
(iv)

{b,a}
(v)

{d,c}

Question 18

18.

Given the bar graph, find the minimum frequency

(i)

45
(ii)

50
(iii)

35
(iv)

30
(v)

40

Question 19

19.

Which of the following class intervals are in inclusive form?

a)	33 - 39 , 39 - 45 , 45 - 51...
b)	36 - 42 , 43 - 49 , 50 - 56,...
c)	15 - 21 , 21 - 27 , 27 - 33,...
d)	14.5 - 21.5 , 21.5 - 28.5 , 28.5 - 35.5...
e)	15 - 21 , 22 - 28 , 29 - 35,...

(i)

{c,e,b}
(ii)

{a,b}
(iii)

{d,a,b}
(iv)

{c,e}
(v)

{b,e}

Question 20

20.

The marks obtained by 10 students in a test are given below. Find the mean of their marks when the marks of each student is decreased by 1.

45

12

24

37

38

34

33

30

41

37

(i)

385
12
(ii)

319
10
(iii)

323
10
(iv)

257
8
(v)

321
10

Question 21

21.

Read the column-graph given below. Find the year that has minimum food grains production.

(i)

2010
(ii)

2008
(iii)

2011
(iv)

2007
(v)

2009

Question 22

22.

The marks obtained by
16
students in an examination are given below.
Represent the data in the form of a frequency distribution table
in exclusive form
taking class size
7
.
76

78

79

48

65

60

53

41

51

64

71

68

48

75

49

75

(i)

Marks

41 - 48

48 - 55

55 - 62

62 - 69

69 - 76

76 - 83

No. of Students

1

5

1

7

3

3
(ii)

Marks

41 - 48

48 - 55

55 - 62

62 - 69

69 - 76

76 - 83

No. of Students

1

5

1

3

3

3
(iii)

Marks

41 - 48

48 - 55

55 - 62

62 - 69

69 - 76

76 - 83

No. of Students

1

3

1

3

3

5
(iv)

Marks

41 - 48

48 - 55

55 - 62

62 - 69

69 - 76

76 - 83

No. of Students

1

1

5

3

3

3
(v)

Marks

41 - 48

48 - 55

55 - 62

62 - 69

69 - 76

76 - 83

No. of Students

1

5

5

3

3

3

Question 23

23.

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

Height (in cm)

131

135

139

167

168

171

No. of students

2

3

4

1

1

4

(i)

141

cm
(ii)

139

cm
(iii)

137

cm
(iv)

138

cm
(v)

140

cm

Question 24

24.

Ages of 13 students (in years) are given below. Find the mean age.

13

14

11

11

15

13

14

11

14

11

10

13

12

(i)

164
13

years
(ii)

162
13

years
(iii)

188
13

years
(iv)

163
13

years
(v)

175
13

years

Question 25

25.

The number of classes of class size
5
required to represent
the given random sample in exclusive form
1

5

5

6

7

9

9

12

17

18

18

20

27

27

28

29

30

31

35

37

37

37

38

40

42

47

(i)

11
(ii)

12
(iii)

10
(iv)

7
(v)

9

Assignment Key