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Answer:
[tex]A\ u\ B\ n\ C = \{2\}[/tex]
Step-by-step explanation:
Given
[tex]A = \{1, 3, 5, 15\}[/tex]
[tex]B = \{2, 3, 5, 7\}[/tex]
[tex]C = \{2, 4, 6, 8\}[/tex]
Required
Determine (A U B) ∩ C
First, we calculate A u B
[tex]A\ u\ B = \{1,3,5,15\} \ u\ \{2,3,5,7\}[/tex]
This means that we bring A and B together without repetition.
[tex]A\ u\ B = \{1,2,3,5,7,15\}[/tex]
Next:
[tex]A\ u\ B\ n\ C = \{1,2,3,5,7,15\}\ n\ \{2,4,6,8\}[/tex]
This means that we only get the common items
[tex]A\ u\ B\ n\ C = \{2\}[/tex]