In a n-sided regular polygon, the probability that the two diagonal chosen at random will intersect inside the polygon is

\[\frac{2{}^{n}{{C}_{2}}}{{}^{({}^{n}{{C}_{2}}-n)}{{C}_{2}}}\]

\[\frac{^{n(n-1)}{{C}_{2}}}{{}^{({}^{n}{{C}_{2}}-n)}{{C}_{2}}}\]

\[\frac{^{n}{{C}_{4}}}{{}^{({}^{n}{{C}_{2}}-\,n)}{{C}_{2}}}\]

In a n-sided regular polygon, the probability that the two diagonal ch

1.	In a n-sided regular polygon, the probability that the two diagonal chosen at random will intersect inside the polygon is
A.	\[\frac{2{}^{n}{{C}_{2}}}{{}^{({}^{n}{{C}_{2}}-n)}{{C}_{2}}}\]
B.	\[\frac{^{n(n-1)}{{C}_{2}}}{{}^{({}^{n}{{C}_{2}}-n)}{{C}_{2}}}\]
C.	\[\frac{^{n}{{C}_{4}}}{{}^{({}^{n}{{C}_{2}}-\,n)}{{C}_{2}}}\]
D.	none of these
Answer» D. none of these

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In a n-sided regular polygon, the probability that the two diagonal chosen at random will intersect inside the polygon is

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