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Question : 85 of 160
Marks:
+1 ,
-0
Solution:
Total number of points in a plane is
3 p .
∴ Maximum number of triangles
= ‌ 3 p C 3 − 3 ⋅ ‌ p C 3 [Here, we subtract those triangles which points are in a line]
‌ = ‌ − 3 ⋅ ‌ ‌ = ‌ − ‌ ‌ = ‌ [ 9 p 2 − 9 p + 2 − ( p 2 − 3 p + 2 ) ] ‌ = p 2 ( 4 p − 3 ) © examsiri.com
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