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Questions  

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

a
2nC2  nC2−nC2
b
C2   n(n−1)C2    nC2−n
c
nC4  nC2−nC2
d
none of these

detailed solution

Correct option is C

When 4 points are selected, we get one intersecting point.So, probability is nC4  nC2−nC2

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