cbse class x statistics assignment 4 0 · 2020. 5. 23. · cbse class x statistics assignment...

48 X – Maths

6

1.

(i) .i i

i

f xX

f

(ii) ,i i

i

f dX a

f di = xi – a.

(iii) i i i

ii

f u x aX a h u

hf

2.

1 0

1 0 22f f

l hf f f

f1 =

f0 =

f2 =

h =

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X – Maths 49

3.

2n Cfl hf

n =

Cf =

f =

h =

4. = – 2

5.

x-

x-

x-

x-



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50 X – Maths

1. 10

(a) 5 (b) 6

(c) 5.5 (d) 6.5

2. 4, 6, 8, 10, x, 14 16 10 ‘x’

(a) 11 (b) 12

(c) 13 (d) 9

3. x, x + 1, x + 2, x + 3, x + 4, x + 5 x + 6

(a) x (b) x + 3

(c) x + 4 (d) 3

4. 2, 3, 2, 5, 6, 9, 10, 12, 16, 18 20

(a) 9 (b) 20

(c) 10 (d) 9.5

5. 2, 3, 6, 0, 1, 4, 8, 2, 5

(a) 1 (b) 3

(c) 4 (d) 92

6. 1, 0, 2, 2, 3, 1, 4, 5, 1, 0

(a) 5 (b) 0

(c) 1 (d) 2

7. 2, 3, 5, 4, 2, 6, 3, 5, 5, 2 x 2 ‘x’

(a) 2 (b) 3

(c) 4 (d) 5



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X – Maths 51

8.

10–15 15–20 20–25 25–30 30–35

4 7 12 8 2

(a) 30–35 (b) 20–25

(c) 25–30 (d) 15–20

9.

(a) (b)

(c) (d)

10.

(a) 3 = + 2

(b) 3 = + 2

(c) 3 = + 2

(d) = 3 – 2

11. 19.5 – 29.5

(a) 10 (b) 49

(c) 24.5 (d) 25

12.

(a) (b)

(c) (d)



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52 X – Maths

13.

0–10 10–20 20–30 30–40 40–50 50–60 60–70

4 4 8 10 12 8 4

(a) 20–30 (b) 40–50

(c) 30–40 (d) 50–60

14. 20 17 3

(a) 20 (b) 21

(c) 22 (d) 24

15. 5 18 16

(a) 23 (b) 24

(c) 25 (d) 26

16. 5

(a) 5.5 (b) 5.6

(c) 5.7 (d) 5

17. 3, 4, 6, 8, 14

(a) 0 (b) 1

(c) 2 (d) 3

18. = 15 = 16

(a) 10 (b) 11

(c) 12 (d) 13



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X – Maths 53

19. 11 50 49

52

(a) 56 (b) 55

(c) 54 (d) 53

20. 2.6 ‘x’

1 2 3 4 5

4 5 x 1 2

(a) 24 (b) 3

(c) 8 (d) 13

21. 40 160 165 125

22. 24, 25, 26, x + 2, x + 3, 30, 31, 34

27.5 ‘x’

23.

x : 10 12 14 16 18 20

f : 3 5 6 4 4 3

24. 7.5 ‘p’

3 5 7 9 11 13

6 8 15 8 4



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54 X – Maths

25.

x : 12 16 20 24 28 32

f : 5 7 8 5 3 2

26. 53 P

0–20 20–40 40–60 60–80 80–100

12 15 32 P 13

27. 20-30

10 1

20 14

30 36

40 59

50 60

28. 40



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X – Maths 55

29. 40

30. 62.8 50 x

y

0–20 20–40 40–60 60–80 80–100 100–120

5 x 10 y 7 8

31.

300 0

250 12

200 21

150 44

100 53

50 59

0 60



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56 X – Maths

32. 28.5 60

x y

0–10 10–20 20–30 30–40 40–50 50–60

5 x 20 15 y 5

33.

0–10 10–20 20–30 30–40 40–50 50–60 60–70

6 8 10 15 5 4 2

34. 100

10 10

20 15

30 30

40 50

50 72

60 85

70 90

80 95

90 100

35.

0–10 10–20 20–30 30–40 40–50 50–60 60–70 70–80 80–90 90–100

5 6 8 10 15 9 8 7 7 5



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X – Maths 57

36. 10 50

120–130 130–140 140–150 150–160 160–170 Total

2 8 12 20 8 50

37. 65 50 x y

0–20 20–40 40–60 60–80 80–100 100–120 120–140

6 8 x 12 6 y 3

38. X 35

38–40 40–42 42–44 44–46 46–48 48–50 50–52

3 2 4 5 14 4 3

39. 2008-2009

140–150 150–160 160–170 170–180 180–190 190–200

5 10 20 9 6 2 52

40.

0–5 5–10 10–15 15–20 20–25 25–30 30-35 35-40 40–45

20 24 32 28 20 16 34 10 8



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58 X – Maths

1. c 2. b

3. b 4. a

5. b 6. c

7. a 8. b

9. a 10. b

11. c 12. b

13. c 14. a

15. d 16. b

17. a 18. d

19. a 20. c

21. 161 22. x = 25

23. 14.8 24. p = 3

25. 20 26. 28

29. 147.5 30. x = 8, y = 12

31. 182.50 32. x = 8, y = 7

33. = 30, = 30.67, = 33.33

34. 41.32 35. 47.3

36. = 149.8 , = 151.5 , = 154

37. x = 10, y = 5.

38. = 45.8, = 46.5, = 47.9

39. 166.3 40. 13.33



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cbse class x statistics assignment 4 0 · 2020. 5. 23. · cbse class x statistics assignment...

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