Find the missing frequency from the following data. (10)
Marks 0-10 10-20 20-30 30-40 40-50 50-60
No. of
students
15 25 30 - 30 20
Arithmetic mean of marks is 44.
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Answers
Answered by
1
C.I
f
xi
fi xi
0 - 10
12
5
60
10 - 20
16
15
240
20 - 30
6
25
150
30 - 40
f
35
35f
40 - 50
9
45
405
43 + f
855 + 35f
946 + 22f = 855 + 35f
91 = 13f
f= 7
f
xi
fi xi
0 - 10
12
5
60
10 - 20
16
15
240
20 - 30
6
25
150
30 - 40
f
35
35f
40 - 50
9
45
405
43 + f
855 + 35f
946 + 22f = 855 + 35f
91 = 13f
f= 7
Answered by
0
Given:
Marks: 0-10 10-20 20-30 30-40 40-50 50-60
Number of students: 15 25 30 - 30 20
The Arithmetic mean of marks is 44.
To find:
frequency =?
Solution:
please find the attachment.
The answer is "122"
Attachments:
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