Explore statistics and probability concepts, including average absolute deviation, with interactive lessons and exercises on Khan Academy.

Address this question and more as you explore methods for counting how many possible outcomes there are in various situations. Learn about factorial, permutations, and combinations, and look at …

In this article, we’ll review some probability basics, including how to calculate the probability of two independent events both occurring (event X and event Y) or the probability of either of two mutually …

Learn how to calculate probabilities of coin flips using two methods: listing all possible outcomes or multiplying independent events. Understand what independent events are and how to avoid the …

Now they ask us, find the probability, the probability, that it takes fewer than five orders for Lilyana to get her first telephone order of the month. So it's really the probability that C is less than five.

Using a standard deck of cards, what would the probability be of having the four of hearts in your 2-card hand? Well, you can start by assuming you have the four of hearts, then figure out how many options …

Practice Up next for you: Sampling methods Sampling method considerations Practice Not started Mean and standard deviation of sample means

Get ready for Precalculus! Learn the skills that will set you up for success in complex numbers; polynomials; composite and inverse functions; trigonometry; vectors and matrices; series; conic …

Develop a probability model and use it to find probabilities of events. Compare probabilities from a model to observed frequencies; if the agreement is not good, explain possible sources of the …

In this case we are interested in the probability of picking a sample with a proportion of 10% or more, which would be equal to the sum of the areas of all rectangles that represent a proportion of at least …