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If (R={(a,b):a) is brother of (b)(}) on a set of people, why is it generally not symmetric?

Answer and explanation

Correct answer: Because (b) need not be brother of (a)

Step 1: For symmetry, the relation must be true in both directions. Step 2: If (a) is brother of (b), (b) may be a sister, so (b) need not be brother of (a). Step 3: In real-life examples, read the meaning of the relation carefully.

Related tags

Symmetric RelationReal Life RelationBrother RelationConceptualRelations And FunctionsMathematicsClass 12 Mcq

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