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Problem
Problem
Let
U
=
whole numbers between 10 and 20 inclusive
U = {\text{whole numbers between 10 and 20 inclusive}}
U
=
whole numbers between 10 and 20 inclusive
,
A
=
factors of 120
A = {\text{factors of 120}}
A
=
factors of 120
, and
B
=
multiples of 3
B = {\text{multiples of 3}}
B
=
multiples of 3
. List the elements of: (a)
A
A
A
(b)
B
B
B
(c)
A
′
A'
A
′
(d)
B
′
B'
B
′
(e)
A
∩
B
A \cap B
A
∩
B
(f)
A
∪
B
A \cup B
A
∪
B
(g)
A
′
∩
B
A' \cap B
A
′
∩
B
(h)
A
′
∪
B
A' \cup B
A
′
∪
B
(i)
A
∩
B
′
A \cap B'
A
∩
B
′
(j)
A
∪
B
′
A \cup B'
A
∪
B
′
(k)
A
′
∩
B
′
A' \cap B'
A
′
∩
B
′
(l)
A
′
∪
B
′
A' \cup B'
A
′
∪
B
′
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