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Random Variables
hard
0:00.0
Let
X
,
Y
X, Y
X
,
Y
be independent
N
(
0
,
1
)
N(0, 1)
N
(
0
,
1
)
. What is
E
[
X
Y
]
E[XY]
E
[
X
Y
]
?
A
1
1
1
B
0
0
0
C
−
1
-1
−
1
D
0.5
0.5
0.5
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