EduSahara™ Worksheet

Question 1

1.

The marks obtained by 13 students in a test are given below. Find the mean of their marks when the marks of each student is increased by 4.

24

23

39

2

4

1

13

19

46

39

10

42

19

(i)

333
13
(ii)

283
11
(iii)

335
13
(iv)

331
13
(v)

383
15

Question 2

2.

Rainfall of 10 days (in mm) are given below. Find the median rainfall.

11

10

10

12

14

12

10

11

5

12

(i)

10

mm
(ii)

9

mm
(iii)

13

mm
(iv)

11

mm
(v)

12

mm

Question 3

3.

Daily wages of 12 labourers (in ₹) are given below. Find the median wage.

447

337

434

371

383

427

324

301

470

493

459

402

(i)

₹

416.50
(ii)

₹

415.00
(iii)

₹

414.50
(iv)

₹

415.50

Question 4

4.

If the mean of the following frequency distribution is
8

6
35
,

find the value of 'x'.

Value

Frequency

5

8

6

5

7

2

8

3

9

x

10

7

11

3

12

4

(i)

2
(ii)

6
(iii)

3
(iv)

0
(v)

4

Question 5

5.

Temperatures of 13 days (in °C) are given below. Find the median temperature.

29

30

30

31

29

31

34

32

29

29

26

34

33

(i)

32

°C
(ii)

31

°C
(iii)

28

°C
(iv)

30

°C
(v)

29

°C

Question 6

6.

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

Temperature (in degree C)

26

27

28

31

32

33

34

35

No. of days

4

2

2

1

1

1

3

1

(i)

151
5

°C
(ii)

159
5

°C
(iii)

149
5

°C
(iv)

30

°C
(v)

154
5

°C

Question 7

7.

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

Rainfall (in mm)

5

9

10

11

12

13

14

No. of days

3

6

2

8

2

3

1

(i)

279
25

mm
(ii)

256
25

mm
(iii)

304
25

mm
(iv)

51
5

mm
(v)

254
25

mm

Question 8

8.

Temperatures of 10 days (in °C) are given below. Find the mean temperature.

26

27

27

32

34

27

31

32

26

31

(i)

59
2

°C
(ii)

147
5

°C
(iii)

313
10

°C
(iv)

293
10

°C
(v)

303
10

°C

Question 9

9.

Rainfall of 25 days are given below. Find the median.

Rainfall (in mm)

5

7

9

11

14

15

No. of days

6

5

4

2

2

6

(i)

9

mm
(ii)

7

mm
(iii)

10

mm
(iv)

11

mm
(v)

8

mm

Question 10

10.

The scores obtained by 8 students in a test are given below. Find the mean score.
18

6

3

4

11

7

18

18

(i)

18
(ii)

10

5
8
(iii)

3
(iv)

9
(v)

15

Question 11

11.

Heights of 14 plants (in cm) are given below. Find the median height.

54

79

80

74

92

95

97

76

71

73

63

87

60

94

(i)

155
2

cm
(ii)

78

cm
(iii)

159
2

cm
(iv)

157
2

cm

Question 12

12.

Heights of 14 students (in cm) are given below. Find the median height.

140

125

167

128

167

135

132

138

140

126

166

164

132

142

(i)

138

cm
(ii)

137

cm
(iii)

140

cm
(iv)

139

cm
(v)

141

cm

Question 13

13.

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

Score

70

72

73

75

78

82

84

85

86

88

No. of students

3

3

1

4

1

3

3

5

1

1

(i)

79
(ii)

2024
25
(iii)

1974
25
(iv)

1976
25
(v)

1999
25

Question 14

14.

Weights of 15 students (in kg) are given below. Find the mean weight.

46

45

50

40

48

55

46

43

44

42

43

53

49

59

47

(i)

143
3

kg
(ii)

48

kg
(iii)

142
3

kg
(iv)

148
3

kg
(v)

145
3

kg

Question 15

15.

Find the median of the first 15 odd numbers.

(i)

14
(ii)

16
(iii)

13
(iv)

17
(v)

15

Question 16

16.

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

Weight (in kg)

41

44

45

47

50

53

55

57

60

No. of students

2

3

1

4

3

2

2

1

2

(i)

50

kg
(ii)

101
2

kg
(iii)

99
2

kg
(iv)

103
2

kg

Question 17

17.

Heights of 11 students (in cm) are given below. Find the mean height.

135

156

147

161

166

166

144

148

134

172

156

(i)

1696
11

cm
(ii)

1685
11

cm
(iii)

1707
11

cm
(iv)

1687
11

cm
(v)

1686
11

cm

Question 18

18.

Find the median of all prime numbers between 20 and 100.

(i)

58
(ii)

56
(iii)

59
(iv)

60
(v)

62

Question 19

19.

Daily wages of 14 labourers (in ₹) are given below. Find the mean wage.

388

475

497

489

442

373

449

383

367

332

461

465

411

443

(i)

₹

427.79
(ii)

₹

428.79
(iii)

₹

426.79
(iv)

₹

426.86
(v)

₹

426.93

Question 20

20.

Heights of 15 plants (in cm) are given below. Find the mean height.

91

88

59

98

93

61

77

58

62

59

64

54

67

100

73

(i)

369
5

cm
(ii)

378
5

cm
(iii)

373
5

cm
(iv)

368
5

cm
(v)

74

cm

Question 21

21.

Find the mean of all prime numbers between 50 and 90.

(i)

635
9
(ii)

211
3
(iii)

637
9
(iv)

775
11
(v)

495
7

Question 22

22.

If the mean of
4
samples is
28

1
2
,

what is the new mean if
5
is added to each number.

(i)

34
(ii)

67
2
(iii)

69
2
(iv)

65
2
(v)

133
4

Question 23

23.

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

Height (in cm)

129

133

136

150

154

156

164

175

No. of students

1

3

6

3

2

1

2

7

(i)

150

cm
(ii)

148

cm
(iii)

151

cm
(iv)

152

cm
(v)

149

cm

Question 24

24.

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

Score

70

71

73

74

76

82

84

89

No. of students

3

1

3

3

4

1

2

3

(i)

73
(ii)

75
(iii)

76
(iv)

77
(v)

74

Question 25

25.

Find the mean of the first 10 even numbers.

(i)

12
(ii)

11
(iii)

8
(iv)

10
(v)

14

Assignment Key