Lesson 6 3 Guide for Making Predictions with Theoretical Probability

To calculate the likelihood of an event happening, you must first understand how to approach it using a mathematical model. Start by identifying the total number of possible outcomes and the number of favorable ones. This basic principle is at the core of determining the chances of specific results in random experiments.

Next, apply the formula: probability = favorable outcomes / total outcomes. This will give you the probability as a fraction, decimal, or percentage. Keep in mind that this method assumes all outcomes are equally likely. For example, when tossing a fair coin, there are two possible results: heads or tails, giving you a 1/2 chance of each.

While practicing, always verify that your sample space includes all possible results. If you miss any potential outcome, your calculation will not be accurate. Use this approach to solve problems involving dice rolls, card draws, or any random event where you can predict outcomes based on clear ratios.