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Mathematics
Mathematics
Problem
A discrete random variable
X
X
X
can take the values
1
1
1
,
2
2
2
,
3
3
3
and
4
4
4
. If
P
(
X
=
1
)
=
0.15
P(X=1)=0.15
P
(
X
=
1
)
=
0.15
,
P
(
X
=
2
)
=
0.30
P(X=2)=0.30
P
(
X
=
2
)
=
0.30
and
P
(
X
=
3
)
=
0.25
P(X=3)=0.25
P
(
X
=
3
)
=
0.25
, find
P
(
X
=
4
)
P(X=4)
P
(
X
=
4
)
. a)
0.20
0.20
0.20
b)
0.30
0.30
0.30
c)
0.55
0.55
0.55
d)
0.25
0.25
0.25
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