MathDB

12

Part of 2017 ASDAN Math Tournament

Problems(1)

2017 Guts #12

Source:

11/25/2022
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 66 minutes?
2017Guts Round