The birthday paradox

In a room of just 23 people, is it more likely than not that at least two of them share a birthday?

~9 minWritten answer · compare with the solutionComplementary countingProbability

Stuck? A gentle nudge

Something off?

Workspace

Your working

Check your full solution

Upload photos of your handwritten work or a PDF, and Lemma will read it and tell you whether it's right — and where it first goes wrong if not.