
mathsisfun.com
https://www.mathsisfun.com/data/probability.html
Probability - Math is Fun
How likely something is to happen. Many events can't be predicted with total certainty. The best we can say is how likely they are to happen, using the idea of probability. When a coin is tossed, there are two possible outcomes: Also: When a single die is thrown, there are six possible outcomes: 1, 2, 3, 4, 5, 6.