CBSE Class 10 Answered
The following distribution shows the daily pocket money of children of a locality. The mean pocket allowance is Rs. 18. Find the missing frequency f.
Daily pocket money (in Rs.)
No. of children
11-13
7
13-15
6
15-17
9
17-19
13
19-21
f
21-23
5
23-25
4
Asked by Topperlearning User | 06 Nov, 2017, 01:22: PM
Expert Answer
Daily pocket money (in Rs.)
|
xi
|
fi
|
fi xi
|
11-13
|
12
|
7
|
84
|
13-15
|
14
|
6
|
84
|
15-17
|
16
|
9
|
144
|
17-19
|
18
|
13
|
234
|
19-21
|
20
|
f
|
20f
|
21-23
|
22
|
5
|
110
|
23-25
|
24
|
4
|
96
|
|
|
44+f
|
|
Answered by | 06 Nov, 2017, 03:22: PM
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