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  4. If A = 1,2,4 B = 2,4, 5 C = 2,5 then (A - C) × (B - C) is equal to

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Q. If $A = \{1,2,4\}$, $B = \{2,4, 5\}$, $C = \{2,5\}$, then $(A - C) \times (B - C)$ is equal to

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Solution:

$A - C = \{1,4\}$ and $B - C = \{4\}$
$\therefore (A - C) \times (B - C) $
$= \{1,4\} \times \{4\} = \{(1,4), (4,4)\}$.