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Problem
Problem
Suppose
A
A
A
and
B
B
B
are disjoint sets. Use a Venn diagram to show that
n
(
A
∪
B
)
=
n
(
A
)
+
n
(
B
)
n(A \cup B) = n(A) + n(B)
n
(
A
∪
B
)
=
n
(
A
)
+
n
(
B
)
.
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