Sun Oct 05, 2014 7:10 am by Tigrex22 


Well, if you made an undirected graph the answer would be: (n*(n1))/2
And that is (4*3)/2 that is 12/2 which is 6.
Explanation(wikipedia): Undirected graph:
An undirected graph is one in which edges have no orientation. The edge (a, b) is identical to the edge (b, a), i.e., they are not ordered pairs, but sets {u, v} (or 2multisets) of vertices. The maximum number of edges in an undirected graph without a selfloop is n(n  1)/2.
[img]https://imagizer.imageshack.us/v2/202x136q90/631/mhA5sJ.png[/img] 




Tue Apr 21, 2015 9:46 am by yazhini 


sure 6 is the ans..... 




Thu May 31, 2018 5:53 pm by bedead 


The answer is 6 






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