The Birthday Problem

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A famous problem in elementary probability is to compute the likelihood that two people in a room with people have the same birthday. Here we adopt the common simplifying assumptions that the birthdays in the room are drawn independently and at random from a 365-day year. Use the slider to adjust the number of people in the room.

Contributed by: Chris Boucher (May 2011)
Open content licensed under CC BY-NC-SA


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