Probability is a measure of the likelihood that a particular event will occur. It is expressed as a number between 0 and 1, where 0 indicates impossibility and 1 indicates certainty. The expected answer should provide a clear definition of probability and explain its mathematical representation. It should include examples of real-life scenarios where probability is applied, such as in weather forecasting, medical diagnosis, or decision-making processes. The answer should also discuss the concept of conditional probability and how it is used to make predictions and analyze outcomes.