(10) points में से (4) points collinear हैं और बाकी कोई (3) collinear नहीं हैं। Triangles की count कौन-सी है?
Among (10) points, (4) points are collinear and no other (3) are collinear. Which count gives the triangles?
Explanation opens after your attempt
A. \(^{10}C_3-{}^{4}C_3\)
Concept
Subtract collinear (3)-point selections from total (3)-point selections. In exams subtract invalid selections.
Why this answer is correct
The correct answer is A. \(^{10}C_3-{}^{4}C_3\). Subtract collinear (3)-point selections from total (3)-point selections. In exams subtract invalid selections.
Exam Tip
Total (3)-point selections से collinear (3)-point selections हटते हैं। परीक्षा में invalid selections घटाएं।
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