Webthe birthday paradox, also known as the birthday problem, states that in a random gathering of 23 people, there is a 50% chance that two people will have the same. Webthe birthday paradox is a compelling example of how probability theory can challenge common intuitions. What seems like a rare event can become surprisingly. Webthe birthday paradox is a mathematical problem put forward by von mises. What is the minimum number $ n $ of people in a group so that there is a 50%. Webthe birthday problem (also called the birthday paradox) deals with the probability that in a set of n n randomly selected people, at least two people share the same birthday. Though it is not technically a paradox, it is often referred to as such because the probability is.