CBSE Class 10 Answered
Find the missing frequencies in the following distribution. It is given that median of the distribution is 41 and the total number of observations is 82.
Class
10 – 20
20 – 30
30 – 40
40 – 50
50 – 60
60 - 70
Frequency
10
f1
15
20
f2
11
Asked by Topperlearning User | 12 Feb, 2014, 12:31: PM
Expert Answer
|
Class
|
f
|
cf
|
|
10 – 20
|
10
|
10
|
|
20- 30
|
f1
|
10 + f1
|
|
30 – 40
|
15
|
25 + f1
|
|
40 – 50
|
20
|
45 + f1
|
|
60 - 70
|
f2
|
45 + f1 + f2
|
|
70 - 80
|
11
|
56 + f1 +f2
|
Total number of observations = 82 = 56 + f1 + f2
Median = 41 (given)
Thus, median class is 40 - 50
n = 82
Answered by | 12 Feb, 2014, 02:31: PM
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