Find out Arithmetic Mean from the following data
Marks No. of Students 0-10 10 10-20 12 20-30 20 30-40 18 40-50 10
Answers
Answered by
16
Answer:
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
proper correct answer of this question
Similar questions