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NDA Math Sequences and Series
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© examsnet.com
Question : 19
Total: 79
The geometric mean of a set of observations is computed as
10
.
The geometric mean obtained when each observations
x
1
is replaced by
3
x
i
4
is
[NDA-I 2021]
810
900
30000
81000
Validate
Solution:
👈: Video Solution
Concept:
If
G
M
of series
x
i
=
a
, then
- GM of
λ
x
i
=
λ
a
- GM of
x
i
n
=
a
n
Calculation:
Given
G
M
of
x
i
=
10
Then GM of
x
i
4
=
10
4
=
10000
Now GM of
3
x
i
4
=
3
×
10000
=
30000
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