Lesson:
Birthday Problem 


What is the probability that in a room of 25 people at least 2 people share the same birthday? What is your guess? Use the simulation below to empirically (by experiment) figure out the probability. 
Run the simulation for 25 people 10
times. Record
the number of times you had at least one match for
each trial. What is the percentage of successful
matches to trials? (One or more matches counts as only
one match.)
Student
activity and collective crowd sourcing
Have students
collect the birthday data on several groups of 25 people.
These
people can be arbitrarily chosen as long as you do
not pay any attention to their birthdays until you
have the 25 people chosen. For example you can
choose the first 25 presidents of the United
States or any 25 from a current list of
presidents.
Source: Original Version 1.0 developed at CIESE Center for Innovation in Engineering & Science Education (2007) Revised 10.24.19 currently under construction 