Questions
There are 10 points in a plane, out of these 6 are collinear. lf N is the number of triangles formed by joining these points, then
detailed solution
Correct option is B
lf out of n points, m are collinear, thenNumber of triangles = nC3−mC3.'. Number of triangles = 10C3−6C3=120−20⇒N=100Similar Questions
There arepoints in a plane, no two of which are in a straight line except 4, all of which are in a straight line. The number of triangles that can be formed by using these points is
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