Questions
There are points in a plane, out of these are collinear. If is the number of triangles formed by joining these points, then
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a
N≤100
b
100
c
140
d
N>190
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Correct option is A
Solution: Number of triangles=10C3−6C3=120−20=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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