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Mathematics
Problem
If
P
(
A
∣
B
)
=
1
P(A\mid B)=1
P
(
A
∣
B
)
=
1
for two events
A
A
A
and
B
B
B
with positive probabilities, which of the following must be true? a)
A
⊆
B
A\subseteq B
A
⊆
B
b)
B
⊆
A
B\subseteq A
B
⊆
A
c)
P
(
A
)
=
1
P(A)=1
P
(
A
)
=
1
d)
P
(
A
)
=
P
(
B
)
P(A)=P(B)
P
(
A
)
=
P
(
B
)
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