From the course: Statistics Foundations 2: Probability
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Permutations - Microsoft Excel Tutorial
From the course: Statistics Foundations 2: Probability
Permutations
- [Instructor] Probabilities are ratios, a desired event divided by all the possible outcomes. For example, the probability of drawing an ace from a standard deck of 52 cards. Desired event; draw one of the four aces possible. Possible outcomes; 52 cards. Easy, we know there are four aces, we know there are 52 cards. But when you're out there all alone in the real world, sometimes isn't that easy to figure out what all the possible outcomes are. That's why it might be helpful to understand permutations and combinations. Both attempt to give us every possible outcome. The difference is that permutations are interested in the order of things and combinations are not. In this video, I'll cover permutations. For example, the letters A and B can be arranged in two permutations, AB, and BA. How about the numbers, 1, 2, 3? Here we have six permutations. But as the number of objects increases, listing them out becomes…
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