calculate arithmetic mean by assumed mean method sales( x) 0-10,10-20,20-30,30-40,40-50 no.of .firms (f) 10,20,30, 15, 5.
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Let the assumed mean be A=35
Marks Mid-value
(x) No. of students
(f) d=x−35 fd
0−10
10−20
20−30
30−40
40−50
50−60 5
15
25
35
45
55 5
10
25
30
20
10 −30
−20
−10
0
10
20 −150
−200
−250
0
200
200
∑f=100 ∑fd=−200
x
=A+
∑f
∑fd
=35+(
100
−200
)=35−2=33
Answered by
0
Answer:
33 is the answer of this question
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