📅 MIT Science Bowl Invitational 2020🎓 HS🔄 Round 6#️⃣ Question 13🌟 BONUS✍️ Short Answer
An ant is at vertex A of a regular tetrahedron. During every hour, he randomly jumps to another vertex of the tetrahedron. What is the probability that, after 3 hours, the ant will not be at vertex A?
✔️Answer:7/9
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