Combinatoricshard
0:00.0
A set of distinct points lies on a circle. If the number of convex quadrilaterals that can be formed using these points as vertices is exactly 5 times the number of triangles that can be formed using these points as vertices, find .
A set of distinct points lies on a circle. If the number of convex quadrilaterals that can be formed using these points as vertices is exactly 5 times the number of triangles that can be formed using these points as vertices, find .