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The straight lines l_(2)||l_(2)||l_(3) and lies in the same plane A total of m points are taken on l_(1) ,n points on l_(2) and k point on l_(3), then maximum number of triangles formed with vertices at these points are |
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Answer» `""^(m+n+K)C_(3)-(""^(m)C_(3)+""^(n)C_(3)+""^(k)C_(3))` |
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