This video covers the multiplication rule for probability which is used in "and" problems, such as the probability of rolling two dice and getting a 5 "and" a 6, or flipping two coins and getting a head "and" a tails. (As the name implies, multiplication is involved.)
5% Fudge Rule for Multiplication Rule
This is a quick video explaining when you're allowed to sort of pretend that dependent events -- such as drawings "without replacement" -- are "close enough" to independent that you can do the math as if they're independent. Hint: the cutoff is around 5 percent.
Hybrid Multiplication & Addition Rule Problems
Often in probability word problems, you're going to need a combination of these two rules because outcome probabilities that you calculate with the multiplication rule have to be added up to get the overall probability of a compound event. Things like rolling even numbers in dice, or flipping some combination of heads and tails.
If you do not have an account, you should get one, because it is awesome! You can save a playlist for each test or each chapter, and save your "greatest hits" into a "watch right before the final" list (not that we recommend cramming, but when in Rome...)