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Birthday paradox probability facts

Explore the birthday paradox and learn why in a group of 23 people there's over a 50% chance two share a birthday. Verified probability facts.

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foodexpert

@foodexpert · Oct 20, 2026

In a room of just 23 people, there's a better than 50% chance two share a birthday

This is the birthday paradox. With 23 people there are 253 possible pairs, which brings the probability to about 50.7%.

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