Birthday Paradox
Assuming birthdays are uniformly distributed across 365 days and ignoring leap years, what is the minimum number of people needed in a room such that the probability of at least two sharing a birthday exceeds 50%?
Related problems & prerequisites
Worth solving first
- The Handshake Count 3.0/10
Source: Classic result popularised by Richard von Mises (1939); standard in probability texts. Statement written for AxiomIQ.