CBSE Class 10 Answered
Find
the missing frequency for the given data if mean of distribution is 52.
Wages (In Rs.)
10
- 20
20
- 30
30
- 40
40
- 50
50
- 60
60
- 70
70
- 80
No.
of workers
5
3
4
f
2
6
13
OR
Find
the mean of following distribution by step deviation method.
Daily
Expenditure :
100
- 150
150
- 200
200-
250
250
- 300
300-
350
No.
of householders :
4
5
12
2
2
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
|
C.I. |
fi |
xi |
fi.xi |
|
10 - 20 |
5 |
15 |
75 |
|
20 - 30 |
3 |
25 |
75 |
|
30 - 40 |
4 |
35 |
140 |
|
40 - 50 |
f |
45 |
45f |
|
50 - 60 |
2 |
55 |
110 |
|
60 - 70 |
6 |
65 |
390 |
|
70 - 80 |
13 |
75 |
975 |
|
|
33+f |
|
1765+45f |
Mean = 
OR
|
C.I |
fi |
xi |
di |
fidi |
|
100 - 150 |
4 |
125 |
-2 |
-8 |
|
150 - 200 |
5 |
175 |
-1 |
-5 |
|
200 - 250 |
12 |
225 |
0 |
0 |
|
250 - 300 |
2 |
275 |
1 |
2 |
|
300 - 350 |
2 |
325 |
2 |
4 |
|
Total |
25 |
|
|
-7 |
Let A = 225
Answered by | 04 Jun, 2014, 03:23: PM
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