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AMU Engineering 2020 solved paper Solved Paper
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© examsnet.com
Question : 149
Total: 150
The median of 100 observations grouped in classes of equal width is 25 . If the median class interval is
20
−
30
and the number of observations less than 20 is 45 , then the frequency of median class is
20
12
10
15
Validate
Solution:
We have,
N
=
100
,
F
=
45
,
l
=
20
,
h
=
10
and Median
=
25
Let
f
be the frequency of the mediana class.
Then,
Median
=
l
+
N
2
−
F
f
×
h
⇒
25
=
20
+
50
−
45
f
×
10
⇒
5
=
50
f
⇒
f
=
10
© examsnet.com
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