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On (A={1,2,3,4}), which statement is correct about (R={(a,b):a+b\text{ is even}})?

Answer and explanation

Correct answer: (R) is symmetric

Step 1: If (a+b) is even, then (b+a) is also even. Step 2: Hence if ((a,b)\in R), then ((b,a)\in R) too. Step 3: In addition-based rules, changing order does not change the sum, so symmetry is easy to test.

Related tags

Even SumSymmetric RelationRule BasedRelations And FunctionsMathematicsClass 12 Mcq

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