Ant and Triangle Puzzle

Solve the Ant and Triangle Puzzle

Solve the Ant and Triangle Puzzle. Three ants are sitting at the three corners of an equilateral triangle. Each ant starts randomly picks a direction and starts to move along the edge of the triangle. What is the probability that none of the ants collide?

Ant and Triangle Puzzle

Detailed Explanation

The ants can only avoid a collision if they all decide to move in the same direction (either clockwise or anti-clockwise). If the ants do not pick the same direction, there will be a collision. Each ant has the option to either move clockwise or anti-clockwise. There is a one-in-two chance that an ant decides to pick a particular direction. Using simple probability calculations, we can determine the probability of no collision.

Three ants are sitting at the three corners of an equilateral triangle.

N(No collision) = N(All ants go in a clockwise direction) + N( All ants go in an anti-clockwise direction) = 0.5 \times 0.5 \times 0.5 + 0.5 \times 0.5 \times 0.5 = 0.25

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