What’s the birthday paradox

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So the birthday paradox is where if you’re in a room with 23 other people there’s a 50% chance of at least two people having the same birthday. Alternatively, In a room of 75 there’s a 99.9% chance of at least two people matching.

Why is this?

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26 Answers

Anonymous 0 Comments

I actually made a google sheets doc awhile ago to test this. It isn’t exactly accurate as it treats everyday as equally likely to be a birthday, but it was a neat visualization of it. I’m not sure if the link will work, but here goes (refreshing the pages changes the numbers).

[Drive Link](https://docs.google.com/spreadsheets/d/14TAtWgYX3AmjoskiM4PIjDGTc58oWtYxNsTnezbHK1c/edit?usp=sharing)

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