Birthday Paradox

This Birthday Paradox lesson plan also includes:

It might not be your birthday, but the lesson plan is a great gift! Middle and high school pupils use graphing calculators to conduct simulations of the birthday paradox. They discover that, on average, it takes a group of 23 people for two people to have the same birthday.

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CCSS: Designed
Instructional Ideas

  • Have learners survey different classes to see if the school population matches the results of the simulation
  • Resource recommends using the activity to kick-start a unit on probability
Classroom Considerations

  • Note that the resource assumes that TI-83/84 graphing calculators are available

  • Lists detailed instructions, including screenshots, for how to use graphing calculators for the activity
  • Incorporates technology into the math classroom

  • None