There is a triangle and on it there are 3 ants one on each corner and are free to move along sides of triangle what is probability that they will coll

Ants can move only along edges of triangle in either of direction, let’s say one is represented by 1 and another by 0, since there are 3 sides eight combinations are possible, when all ants are going in same direction they won’t collide that is 111 or 000 so probability of collision is 2/8=1/4