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If (A) has (4) elements, how many relations on (A) are both irreflexive and antisymmetric?

Answer and explanation

Correct answer: (3^6)

Step 1: Irreflexivity forces all diagonal pairs to be absent. Step 2: For each pair of distinct elements, antisymmetry gives three choices. Step 3: With (4) elements, there are (6) such pairs, so the count is (3^6).

Related tags

RelationsIrreflexive-AntisymmetricCountingExpertIntroduction To RelationsRelations And FunctionsMathematicsClass 12 Mcq

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