Standard Deviation Sum Product (Jee Mains) | ExamDuo
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Dispersion and Variance
Medium
Standard Deviation Sum Product
Let
a
1
,
a
2
,
.
.
.
.
a
10
be 10 observations such that
10
∑
k
=
1
a
k
=
50
and
∑
∀
k
<
j
a
k
⋅
a
j
=
1100
. Then the standard deviation of
a
1
,
a
2
,
.
.
,
a
10
is equal to :
Ask about this question
SELECT ONE OPTION
A
5
B
√
5
C
10
D
√
115
Check