Mean Variance Transformed Natural Numbers (Jee … | ExamDuo
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Dispersion and Variance
Medium
Mean Variance Transformed Natural Numbers
Let
X
=
{
x
∈
N
:
1
≤
x
≤
17
}
and
Y
=
{
a
x
+
b
:
x
∈
X
and
a
,
b
∈
R
,
a
>
0
}
.
If meanand variance of elements of
Y
are 17 and 216respectively then
a
+
b
is equal to :
Ask about this question
SELECT ONE OPTION
A
-7
B
7
C
9
D
-27
Check