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Random Variables
easy
0:00.0
Given
V
a
r
(
X
)
=
9
Var(X) = 9
V
a
r
(
X
)
=
9
, what is
V
a
r
(
2
X
)
Var(2X)
V
a
r
(
2
X
)
?
A
18
B
36
C
9
D
81
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