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The coin flip conundrum - Po-Shen Loh

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When you flip a coin to make a decision, there's an equal chance of getting heads and tails. But what if you flip the coin repeatedly, so that one option would win as soon as two heads showed up in a row, and another would win as soon as heads was immediately followed by tails? Would each option still have an equal chance? Po-Shen Loh describes the counterintuitive math behind this question.

Lesson by Po-Shen Loh, animation by Augenblick Studios.

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