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Random Variables
medium
0:00.0
Let
X
X
X
have MGF
M
X
(
t
)
=
e
2
t
+
t
2
M_X(t) = e^{2t + t^2}
M
X
(
t
)
=
e
2
t
+
t
2
. What is
V
a
r
(
X
)
Var(X)
V
a
r
(
X
)
?
A
1
B
2
C
4
D
6
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