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**Problem Statement**

What is the number of edges present in a simple (i.e., no parallel edges, no self-loops) and complete (i.e., every pair of vertices is connected by an edge) graph with \( n \) vertices?

**Options**

- ○ Information given is insufficient
- ○ \(\frac{n \times (n-1)}{2}\)
- ○ \(\frac{n \times (n+1)}{2}\)
- ○ \(n \times n\)

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