2017 Guts #12
Source:
November 25, 2022
2017Guts Round
Problem Statement
Anna has a magical compass which can point only in four directions: North, East, South, West. Initially, the compass points North. After each minute, the compass can either turn left, turn right, or stay at its current orientation, with each action occurring with equal probability. What is the probability that the compass points South after minutes?