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Byju's Answer
Standard XII
Mathematics
Median
1. Find the m...
Question
1. Find the mean and median of first 12 odd composite numbers
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Solution
Dear Student,
The
first
12
odd
composite
numbers
:
9
,
15
,
21
,
25
,
27
,
33
,
35
,
39
,
45
,
49
,
51
and
55
.
Now
,
sum
of
numbers
=
9
+
15
+
21
+
25
+
27
+
33
+
35
+
39
+
45
+
49
+
51
+
55
=
404
Now
,
mean
=
sum
of
12
observations
12
=
404
12
≈
33
.
67
Now
,
number
of
oservations
=
n
=
12
even
Median
=
value
of
n
2
th
observation
+
value
of
n
2
+
1
th
observation
2
=
value
of
6
th
observation
+
value
of
7
th
observation
2
=
33
+
35
2
=
68
2
=
34
Regards!
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