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What is the number of symmetric relations on the set (A={1,2,3,4})?

Answer and explanation

Correct answer: (2^{10})

Step 1: The number of symmetric relations on a set with (n) elements is (2^{\frac{n(n+1)}{2}}). Step 2: For (n=4), this becomes (2^{\frac{4(5)}{2}}=2^{10}). Step 3: Do not confuse the total number of pairs in (A\times A) with the count of symmetric relations.

Related tags

Counting Symmetric RelationsClass 12RelationsHardSymmetric RelationRelations And FunctionsMathematicsClass 12 Mcq

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