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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Correct option is C
The required number of triangle is 15C3−4C3=455−4=451Similar Questions
There are 3 set of parallel lines containing respectively lines, lines and lines respectively. The greatest number of parallelograms that can be formed by the system
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