Math, asked by avanijain8764, 11 months ago

PAGE
Find mean and made of following
Marks
20-30
30-40
40-SO
50-60
60-70
students
4
18
42
20
6​

Answers

Answered by ankitagupta0214
0

Step-by-step explanation:

mean. f. c.f. x. fx

20-30 4. 4. 25. 100

30-40. 18. 22. 35. 630

40-50. 42. 64. 45. 1890

50-60. 20. 84. 55. 1100

60-70. 6. 90. 65. 390

____

4110

mean = fx/f

= 4110/90

= 45.66

mode = L + f1 - f0

_____. × i

2f1 - f0 - f2

= 40. +. 42 - 18. × 10

_______

2(42) - 18 - 20

= 40 + 0.5217 × 10

= 45.217

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