CBSE Class 10 Answered
An incomplete distribution is given as follows:
Variable
0-10
10-20
20-30
30-40
40-50
50-60
60-70
Frequency
10
20
?
40
?
25
15
The median value is 35 and the sum of all the frequencies is 170. Using the median formula, fill up the missing frequencies.
Asked by Topperlearning User | 12 Feb, 2014, 12:22: PM
Expert Answer
Let the frequency of class 20 – 30 be f1 and that of class 40 – 50 be f2.
The total frequency is 170.
|
Class interval
|
f
|
cf
|
|
0 -10
|
10
|
10
|
|
10 – 20
|
20
|
30
|
|
20 – 30
|
f1
|
30 + f1
|
|
30 – 40
|
40
|
70 + f1
|
|
40 -50
|
f2
|
70 + f1+ f2
|
|
50 - 60
|
25
|
95 + f1+ f2
|
|
60 -70
|
15
|
110 + f1+ f2
|
Answered by | 12 Feb, 2014, 02:22: PM
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