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Random Variables
medium
0:00.0
Let
X
X
X
have MGF
M
X
(
t
)
=
(
1
−
2
t
)
−
1
M_X(t) = (1-2t)^{-1}
M
X
(
t
)
=
(
1
−
2
t
)
−
1
. What is
E
[
X
]
E[X]
E
[
X
]
?
A
1
B
2
C
4
D
0.5
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