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Mathematics
Problem
Explain in one or two sentences why, for mutually exclusive events
A
A
A
and
B
B
B
, the probability
P
(
A
∪
B
)
P(A\cup B)
P
(
A
∪
B
)
equals
P
(
A
)
+
P
(
B
)
P(A)+P(B)
P
(
A
)
+
P
(
B
)
.
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