What is the chance you have the same birthday as someone else in the room? If it rained yesterday, how likely is it to rain today? Probability gives us the tools to analyze these questions, giving order to seemingly “random” processes. Probability is also the foundation of statistics, which is crucial to research in practically every field. In this course we will build up the basics of probability necessary to begin to understand randomness, through examples and applications ranging from games to data science.