If $U = \{1,2,3,4,5,6,7\}$, $A = \{2,4,6\}$, $B = \{4,5,6,7\}$, then $(A \cup B)'$ is

If $U = \{1,2,3,4,5,6,7\}$, $A = \{2,4,6\}$, $B = \{4,5,6,7\}$, then $(A \cup B)'$ is
  1. $\{1, 3\}$
  2. $\{2,4,6\}$
  3. $\{2,4,5,6,7\}$
  4. $\{4,6\}$

Solution

$A \cup B = \{2,4,5,6,7\}$. $(A \cup B)' = U - (A \cup B) = \{1, 3\}$.

Asked in: MH-SSC-9

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