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Mathematics
Problem
For any two events A and B in a sample space, which of the following statements must always hold true? a)
P
(
A
∩
B
)
=
P
(
A
)
P
(
B
)
P(A\cap B)=P(A)\,P(B)
P
(
A
∩
B
)
=
P
(
A
)
P
(
B
)
b)
P
(
A
′
)
=
1
+
P
(
A
)
P(A')=1+P(A)
P
(
A
′
)
=
1
+
P
(
A
)
c)
P
(
A
∪
B
)
=
P
(
A
)
+
P
(
B
)
−
P
(
A
∩
B
)
P(A\cup B)=P(A)+P(B)-P(A\cap B)
P
(
A
∪
B
)
=
P
(
A
)
+
P
(
B
)
−
P
(
A
∩
B
)
d)
P
(
A
∪
B
)
=
P
(
A
)
+
P
(
B
)
P(A\cup B)=P(A)+P(B)
P
(
A
∪
B
)
=
P
(
A
)
+
P
(
B
)
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