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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
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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