Khan Academy: Probability: Probability and Combinations (Part 2)

Bringing the Khan Academy SAT video series to an end, Sal uses The Official SAT Study Guide to complete the final 16 problems (page 867). In this video, he solves problems 1-7 quickly and proficiently.

Video continues and completes the solution to a navigation problem that uses trigonometry to find the missing length of a triangle. [2:51]

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...

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

Video lesson finding the probability of a specific set of four numbers being the winning set by calculating combinations. [5:10]

Video lesson demonstrating the probability of getting a certain hand in a game of cards by using combinations. Includes link to additional practice problems. [10:51]

Video lesson solving for the probability of winning the mega millions jackpot. [5:29]

The last video in a three-part series on the Binomial Theorem from the Khan Academy. This segment illustrates how the Binomial Theorem is directly related to combinatorics using (a + b)^3 as an example. Students can clearly see how a...

Video example of finding the inverse of a 3 by 3 matrix. Includes using expansion by minors to determine the determinant and finding the matrix of cofactors and adjugate or adjoint matrix. This video also appears in the strand Algebra:...

Video finishing the derivation of Green's theorem by showing that the closed line integral in a vector field with vectors only in the y-direction is equal to the double integral over the region contained within the closed curve of the...