There are 6 canidates and a voter has to vote for any two of them, the required number of ways is?

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There are 6 canidates and a voter has to vote for any two of them, the required number of ways is? Answer: 15

Question context

This question is part of 📏 Arithmetic Aptitude within the broader 🧠 Aptitude Mastery subject and appears in the PPSC Punjab 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.