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Difficulty: Hard
Category: Betting Games
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, martingale
A standard 52-card deck (26 red, 26 black) is shuffled and cards are revealed one at a time. You win \$1 for each red card and lose \$1 for each black card. You can stop at any point and keep your current total. What strategy maximizes your expected winnings?
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