r/Probability

2.3K archived posts · Apr 2011 – Sep 2026

Birthday Probability Task

r/Probability

Archived posts from r/Probability, Apr 2011 to Sep 2026.

Created Jan 1, 2009

4.5KMembers (last snapshot)

2.3KArchived posts

If you have 25 people in one room, what's the chance at least 2 of them will have birthday on the same day? It's a non-leap year.

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