What is the probability of getting equilateral triangles from the vertices of regular hexagon?  Choose the correct choice from the following choices:
A) 1 / 10
B) 2 / 10
C) 3 / 10
D) 4 / 10
E) 5 / 10

Rationale: total no . of triangles that can b made with the vetices hexagon = 6 c 3 = 20 no . of possible outcomes i . e . no . of equality triangles = 2 . . ' . probability = 2 / 20 = 1 / 10 answer : a
Answer: A