Description: Unconditional probability, also known as marginal probability, refers to the probability of an event occurring without considering any additional conditions or restrictions. It is a fundamental concept in probability theory and is used to describe the occurrence of an event within a given sample space. This probability is calculated by dividing the number of favorable outcomes for the event by the total number of possible outcomes. Unconditional probability is essential for establishing a foundation upon which more complex analyses, such as conditional probability, can be built, which considers related events. Mathematically, if A is an event, the unconditional probability of A is denoted as P(A). This type of probability is crucial in various fields, including statistics, scientific research, and decision-making, as it provides an initial measure of the uncertainty associated with a specific event. Unconditional probability is particularly useful in situations where a general assessment of the likelihood of an event is required before considering additional factors that may influence its occurrence.