Khan Academy: Probability: Addition Rule for Probability

Equipped with several examples from the attached module and from standardized tests, Sal takes viewers through the process of prime factorization and divisibility. He demonstrates each skill several times with many different numbers,...

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

Video lesson introducing probability by exploring different understandings of probability and solving for the probability of simple events. Includes link to additional practice problems. [10:30]

A video lesson presenting the Rule of Sarrus for finding the determinants of 3 x 3 matrices. The rule is derived algebraically and then used in a concrete example to find the determinant of a given 3 x 3 matrix. [7:18]

Video lesson using l'Hopital's rule to find the limit of a function containing trigonometric functions. Includes link to additional practice at the top of the video. [7:42]

Video lesson finding the limit of a rational function using l'Hopital's rule and also by factoring. Includes link to additional practice at the top of the video. [5:15]

Video lesson using l'Hopital's rule to find the limit of a function containing a natural logarithm term. Includes link to additional practice at the top of the video. [7:50]

Probability of compound events. The Addition Rule.

An explanation with examples of how to calculate probabilities of two dependent or independent events by multiplying their probabilities. Two practice problems are provided along with their explanations.

Video lesson containing probability examples with playing cards. Venn diagram is used to show the sample space for an example that uses the addition rule. [10:02]