There are 7 non-collinear points. How many triangles can be drawn by joining these points?
Choose the most appropriate option:
A) 22
B) 38
C) 35
D) 29
E) 18

Rationale: explanation : a triangle is formed by joining any three non - collinear points in pairs . there are 7 non - collinear points the number of triangles formed = \ inline { \ color { black } 7 c _ { 3 } } = 35 answer : c ) 35
Answer: C