A binary operation * on a set A means that combining any two elements of A using * always produces another element in A. This property is called closure, which is the defining feature of a binary operation.
If * is a binary operation in A then?
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Question context
This question is part of 📏 Arithmetic Aptitude within the broader 🧠 Aptitude Mastery subject and appears in the SPSC – Sindh Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.