Solution :
If out of n points, m are collinear, then
Number of triangles = nC3 – mC3
∴ Number of triangles = 10C3 – 6C3
= 120 – 20
= 100
If out of n points, m are collinear, then
Number of triangles = nC3 – mC3
∴ Number of triangles = 10C3 – 6C3
= 120 – 20
= 100