EduSahara™ Worksheet

Question 1

1.

Given an even number of random samples with the middle two samples as

find the value of x.

(i)

7
(ii)

9
(iii)

6
(iv)

11
(v)

8

Question 2

2.

If some random sample data is arranged in a frequency distribution table in
inclusive form
with
1
-
8
as the first class,
then the observation
16
falls in which class?

(i)

8

-

15
(ii)

9

-

16
(iii)

8.5

-

16.5
(iv)

9.5

-

15.5
(v)

10

-

17

Question 3

3.

Given the mean of
10
samples as
4

3
5
,

what is the new mean if two samples
4
and
8
are added ?

(i)

37
8
(ii)

31
6
(iii)

29
6
(iv)

21
4
(v)

9
2

Question 4

4.

The marks obtained by Sai in his annual exam are shown below. Find the subject that has maximum score.

(i)

German
(ii)

Science
(iii)

Telugu
(iv)

Spanish
(v)

Biology

Question 5

5.

The class boundaries of the class with frequency x is

Class-Interval

Frequency

42 - 50

5

51 - 59

28

60 - 68

x

69 - 77

4

78 - 86

11

(i)

59

-

68.5
(ii)

59

-

69
(iii)

59.5

-

68.5
(iv)

59.5

-

69
(v)

60

-

68

Question 6

6.

If some random sample data is arranged in a frequency distribution table in
exclusive form
with
3
-
12
as the first class,
then the observation
26
falls in which class?

(i)

21

-

30
(ii)

20

-

29
(iii)

22

-

31
(iv)

20.5

-

30.5
(v)

21.5

-

29.5

Question 7

7.

Read the given column-graph. Find the month that has maximum rainfall.

(i)

July
(ii)

June
(iii)

August
(iv)

October
(v)

November

Question 8

8.

The marks obtained by 12 students in a test are given below. Find the mean of their marks when the marks of each student is increased by 1.

39

30

8

13

48

25

21

50

4

35

26

37

(i)

27
(ii)

28
(iii)

29
(iv)

31
(v)

30

Question 9

9.

Read the given column-graph. Find the month that has minimum rainfall.

(i)

June
(ii)

August
(iii)

September
(iv)

July
(v)

October

Question 10

10.

Scores of 11 students are given below. Find the mode.

Score

71

72

73

75

76

80

88

No. of students

2

1

1

1

4

1

1

(i)

78
(ii)

74
(iii)

76
(iv)

77
(v)

75

Question 11

11.

Find the median of the first 20 odd numbers.

(i)

19
(ii)

21
(iii)

17
(iv)

20
(v)

22

Question 12

12.

The following table gives the data regarding
the favourite sport of
137
students of a school.
Find number of students who like
boxing
.
Sport

running

cricket

hockey

wrestling

swimming

kabaddi

boxing

No. of Students

18

11

16

10

45

13

24

(i)

23
(ii)

25
(iii)

22
(iv)

24
(v)

27

Question 13

13.

684 students of a certain locality use different modes of travel to school as given below.

Mode of travel

RTC Bus

By Foot

School Van

Auto

Moped

School Bus

Scooter

No. of Students

72

81

117

171

108

45

90

Find the number of students whose travelling mode is School Bus.

(i)

44
(ii)

42
(iii)

47
(iv)

46
(v)

45

Question 14

14.

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

Wage (in rupees)

326

334

339

347

374

400

461

477

No. of labourers

2

3

5

2

2

1

4

6

(i)

₹

375.00
(ii)

₹

373.00
(iii)

₹

374.00
(iv)

₹

376.00
(v)

₹

372.00

Question 15

15.

There are certain creatures in a zoo. Find the type of creature that has minimum presense in the zoo.

(i)

Wild animals
(ii)

Reptiles
(iii)

Water animals
(iv)

Beast animals
(v)

Birds

Question 16

16.

There are certain creatures in a zoo. Find the type of creature that has maximum presense in the zoo.

(i)

Beast animals
(ii)

Land animals
(iii)

Water animals
(iv)

Reptiles
(v)

Domestic animals

Question 17

17.

Arrange the following data
19

33

13

14

17

15

10

14

12

10
in ascending order

(i)
12

38

16

28

17

21

30

21

23

24
(ii)
10

10

12

13

14

14

15

17

19

33
(iii)
24

20

26

10

25

35

17

13

40

26
(iv)
34

37

38

37

26

16

26

23

25

20
(v)
27

19

19

38

40

16

32

26

32

32

Question 18

18.

The class mark of the class with frequency x is

Class-Interval

Frequency

5 - 15

2

16 - 26

23

27 - 37

24

38 - 48

x

49 - 59

3

(i)

43
(ii)

41
(iii)

42
(iv)

45
(v)

44

Question 19

19.

Ages of 11 students (in years) are given below. Find the median age.

13

15

10

13

13

11

13

12

15

10

12

(i)

11

years
(ii)

12

years
(iii)

14

years
(iv)

15

years
(v)

13

years

Question 20

20.

Given class interval table, find the sum of frequencies.

Class-Interval

28 - 37

37 - 46

46 - 55

55 - 64

64 - 73

73 - 82

82 - 91

91 - 100

Frequency

23

6

10

4

26

20

2

19

(i)

107
(ii)

111
(iii)

113
(iv)

110
(v)

109

Question 21

21.

The class mark of the class with frequency x is

Class-Interval

Frequency

3 - 13

19

13 - 23

x

23 - 33

30

33 - 43

20

43 - 53

11

(i)

19
(ii)

18
(iii)

17
(iv)

16
(v)

21

Question 22

22.

Weights of 30 students are given below. Find the median.

Weight (in kg)

40

41

44

46

48

51

54

No. of students

4

4

4

6

4

4

4

(i)

44

kg
(ii)

47

kg
(iii)

46

kg
(iv)

48

kg
(v)

45

kg

Question 23

23.

The class marks of a frequency distribution are
30.5 , 37.5 , 44.5 , 51.5
.

Find the class size and class intervals
in exclusive form

(i)

8

;

27

-

34

,

35

-

42

,

43

-

50

,

51

-

58
(ii)

7

;

26

-

33

,

33

-

40

,

40

-

47

,

47

-

54
(iii)

7

;

28

-

35

,

35

-

42

,

42

-

49

,

49

-

56
(iv)

9

;

26

-

34

,

35

-

43

,

44

-

52

,

53

-

61
(v)

7

;

27

-

34

,

34

-

41

,

41

-

48

,

48

-

55

Question 24

24.

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

Height (in cm)

51

61

66

67

79

86

96

100

No. of plants

2

2

4

4

2

4

4

3

(i)

77

cm
(ii)

78

cm
(iii)

79

cm
(iv)

80

cm
(v)

81

cm

Question 25

25.

The observations of an ungrouped data are
x

1
,
x

2
,
x

3
and
x

1
<
x

2
<
x

3
.

(i)
28

,

28

,

168
(ii)
18

,

28

,

88
(iii)
16

,

28

,

86
(iv)
14

,

28

,

84

Assignment Key