# The Birthday Problem and Some Generalizations

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The birthday problem asks, "How many randomly selected people must there be in a room in order for the probability that two people share a birthday to exceed 0.5?" and has the well-known answer 23. The following generalizations are illustrated here, along with answers:

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Contributed by: Marc Brodie (Wheeling Jesuit University) (March 2011)

Open content licensed under CC BY-NC-SA

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"The Birthday Problem and Some Generalizations"

http://demonstrations.wolfram.com/TheBirthdayProblemAndSomeGeneralizations/

Wolfram Demonstrations Project

Published: March 7 2011