There's a rather famous problem in math of probability called the Birthday Paradox. Let's get into how it works, and how creative uses of this hypothetical problem have real-world applications!

Imagine a group of people. How big do you think the group would have to be before there's more than a 50% chance that two people in the group have the same birthday? The answer is - probably lower than you think. David Knuffke explains...

In a room of 23 people, there is a 50% chance that two people share a birthday. How is that possible? Let's figure it out!<b<br/>r/>

Probability part 2/5