Khan Academy: Probability: Permutations and Combinations 4

Video lesson introducing permutations by looking at examples and the formula. [10:11]

Video lesson finding the number of possible 9-card hands from a deck of 36 cards by calculating combinations. Gives general formula for combinations. [7:42]

Video lesson demonstrating the number of possible boards with three different officers from a club of 9 members. [2:19]

Video lesson determining the number of 4-color codes possible by finding the number of permutations. [3:44]

Introductory combination problems, like if you have 5 friends and can pick 2 of them to join you on a boat ride, how many different groups of friends could you take with you? Students receive immediate feedback and have the opportunity...

This video shows the probability of winning a 4-number lottery?

Video lesson finding the probability of making at least three out of five free throws by calculating combinations. [10:36]

Video lesson finding the probability of getting exactly three heads out of eight flips of a coin by calculating combinations. [9:10]

Video defining the addition rule for probability, including finding the probability of mutually exclusive events. [10:43]

Video lesson deriving the formula for finding the probability of k heads in n flips. Includes the formula for calculating combinations. [11:40]