Complete the sentence below. In a probability model, the sum of the probabilities of all outcomes must equal (Type an integer or a decimal. Do not round.)

1.0 In a probability model, the sum of the probabilities of all possible outcomes must equal 1. This ensures that you account for every potential result in your experiment or situation, leaving no room for uncertainty! So think of it as a big party where every guest (outcome) counts - and together they make the whole shebang (the total probability) complete! Probabilities also range from 0 (impossible event) to 1 (certain event), which means that if you have an outcome with a probability of 0.5, it’s got a fair chance of showing up. It's all about balancing those outcomes for a perfect probability party!