if from the following table of airthmatic mean of marks obtained by students is 25, then find the value of x ? class interval 0-10,10-20,20-30,30-40,40-50,marks 3,x,6,10,5
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Marks Midpoint (x) No. of students (f) fx
0−10
10−20
20−30
30−40
40−50
50−60 5
15
25
35
45
55 5
10
25
30
20
10 25
150
625
1050
900
550
∑f=100 ∑f(x)=3300
x
=
∑f
∑f(x)
=
100
3300
=33
∴ Mean =33
Step-by-step explanation:
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