Consecutive Heads vs Tails - Quant Trader Interview Question
Difficulty: Hard
Category: Probability & Statistics
Practice quant interview questions from top firms including Jane Street, Citadel, Two Sigma, DE Shaw, and other leading quantitative finance companies.
Topics: probability, expected-value, markov-chain, mental-math
Problem Description
You are flipping a fair coin. What is the difference between the expected number of flips required to observe the sequence "Heads-Heads" (HH) versus the expected number of flips required to observe the sequence "Tails-Heads" (TH)?
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