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# Let $\mu$ be the universal set and A $\cup$ B $\cup$ C = $\mu$. Then indicate [(A – B) $\cup$ (B – C) $\cup$ (C – A)]c.

(A – B) $\cup$ (B – C) $\cup$ (C – A) is the shaded portion.
$\mu \: A \cup B \cup C$
$\therefore$ [(A – B) $\cup$ (B – C) $\cup$ (C – A)]$^c$ is the unshaded portion