Statistics Calculators: https://www.statssolver.com/
Consider an event A. The complement of A, written Ac, is the even containing all sample points that are not in A. For example, consider the experiment of rolling a die. Recall that the sample points (outcomes) in this experiment are 1,2,3,4,5 and 6. Let's define event A as getting an odd number (1, 3, 5). Then the complement of A will be the even numbers (2, 4, 6). Since an event and its complement make up the entire sample space, the sum of their probabilities is equal to one. This relationship is useful because given the probabilitiy of the complement of an event, we can calculate the probability of the event itself. The formula for this is as follows P(A) = 1 - P(Ac).
0:00 Introduction
2:10 Venn Diagram
3:15 Probability Formula
