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JEE Main 2013 Mathematics question

MathematicsPermutations and CombinationsJEE Main 2013

On the sides AB, BC, CA of a △ABC, 3, 4, 5 distinct points (excluding vertices A, B, C ) are respectively chosen. The number of triangles that can be constructed using these chosen points as vertices are :

Answer: (2)

Solution

From 12 points, triples, minus collinear triples on the same

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Question ID VK-104149