View all of Khan Academy’s lessons and practice exercises on probability and statistics here.

Go deeper with your understanding of probability as you learn about theoretical, experimental, and compound probability, and investigate permutations, combinations, and more!

Here, we'll take a deep dive into the many ways we can calculate the likelihood of different outcomes. From using simulations to the addition and multiplication rules, we'll build a solid …

Learn statistics and probability—everything you'd want to know about descriptive and inferential statistics.

Here, we'll take a deep dive into the many ways we can calculate the likelihood of different outcomes. From using simulations to the addition and multiplication rules, we'll build a solid …

Random variables can be any outcomes from some chance process, like how many heads will occur in a series of 20 flips of a coin. We calculate probabilities of random variables and …

A random variable is some outcome from a chance process, like how many heads will occur in a series of 20 flips, or how many seconds it took someone to read this sentence. Calculate …

About this unit How many outfits can you make from the shirts, pants, and socks in your closet? Address this question and more as you explore methods for counting how many possible …

A random variable is some outcome from a chance process, like how many heads will occur in a series of 20 flips, or how many seconds it took someone to read this sentence. Calculate …

This formula is derived from the definition of conditional probability and helps in calculating joint probabilities of dependent events.