8.There are 7 non-collinear points. How many triangles can be drawn by joining these points?
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Answer – (A)
Solution:
A triangle is formed by joining any three non-collinear points in pairs.
There are 7 non-collinear points.
The number of triangles formed =C37
=7*(7−1)*(7−2)3!
=7*6*53*2*1
=7*5= 35
Title : Permutation And Combination Q8
Description : 8.There are 7 non-collinear points. How many triangles can be drawn by joining these points? A. 35 B. 10 C. 8 D....
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