The Birthday Paradox
How many people do you need to have in a room before the chances are more than 50% of a shared birthday? If you haven't seen this before then I urge you to have a guess now. Is it 180 people? More than that? Fewer than that? What do you think? Most people who haven't seen this before get it very wrong, and then are surprised by the answer. In case you are one of the many, many people who get this
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