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NIMCET 2019 Question Paper with solutions
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© examsnet.com
Question : 19
Total: 120
If
n
Σ
i
=
1
x
i
= 80 and
n
Σ
i
=
1
x
1
2
=400, then a possible value of n among the following is
9
12
15
18
Validate
Solution:
Given
n
Σ
i
=
1
x
i
=
80
and
n
Σ
i
=
1
x
1
2
=
400
We know that.
Σ
x
2
n
>
(
Σ
x
i
n
)
2
∴
400
n
>
(
80
n
)
2
⇒
n
>
16
∴ Possible value of x is 18.
© examsnet.com
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