जॉइन Examsbookउत्तर : 3. "164"
In a plane 8 points are colliner out of 12 points, then the number of triangles we get with those 12 points is5
प्र: In a plane 8 points are colliner out of 12 points, then the number of triangles we get with those 12 points is
- 120false
- 2160false
- 3164true
- 4220false
- उत्तर देखें
- Workspace
उत्तर : 3. "164"
व्याख्या :
Answer: C) 164 Explanation: For a triangle, we need 3 non-collinear points. So with 12 points (when all the 12 are such that any three non-collinear is12C3. But among them 8 points are collinear. If all these 8 points are different we get 8C3 triangles as they are collinear. In 12C3 triangles, we do not get 8C3 triangles Therefore, The number of triangles we get = 12C3-8C3 = 164