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JEE MATHEMATICS MCQ: COMBINATIONS

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There are 15 points 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 15 points is

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Correct option: C

451

Option C (451) is correct because it calculates the total number of possible triangles minus the number of degenerate triangles formed by the 4 collinear points.

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n