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Random Variables
medium
0:00.0
E
[
X
]
=
3
,
V
a
r
(
X
)
=
1
E[X] = 3, Var(X) = 1
E
[
X
]
=
3
,
V
a
r
(
X
)
=
1
. Find
E
[
X
2
]
E[X^2]
E
[
X
2
]
.
A
−
8
-8
−
8
B
9
9
9
C
10
10
10
D
1
1
1
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