The Birthday Problem

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.


  • [Snapshot]
  • [Snapshot]
  • [Snapshot]
    • Share:

Embed Interactive Demonstration New!

Just copy and paste this snippet of JavaScript code into your website or blog to put the live Demonstration on your site. More details »

Files require Wolfram CDF Player or Mathematica.

Related Curriculum Standards

US Common Core State Standards, Mathematics