5.8 The Birthday Problem
- Key Idea 1: Returning to the Key Problem: Among a group of 25 people chosen at random, what is the probability that at least two of them have the same birthday?
Discussion
- To simplify, we’ll ignore February 29 birthdays and confine the analysis to the 365 days in a normal year. We will also assume that all birthdays are equally-likely.
- Here is the procedure.