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Byju's Answer
Standard IX
Mathematics
Properties of Measures of Central Tendency
The mean of 6...
Question
The mean of 6 observations is
17.5
. If five of them are
14
,
9
,
23
,
25
and
10
, find the sixth observation.
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Solution
Given the mean of 6 observations is
17.5
if five of them are
14
,
9
,
23
,
25
and
10
Let 'x' be the sixth observation
we know mean
=
s
u
m
o
f
o
b
s
e
r
v
a
t
i
o
n
s
n
o
o
f
o
b
s
e
r
v
a
t
i
o
n
s
17.5
=
14
+
9
+
23
+
25
+
10
+
x
6
17.5
=
81
+
x
6
81
+
x
=
6
×
17.5
=
105
x
=
105
−
81
x
=
24
∴
sixth observation is
24
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