Probability CalculatorProbability Calculator is an online tool for risk analysis specially programmed to find out the probability for single event and multiple events. In this mathematical definition of probability can extend to infinite sample spaces, and even uncountable sample spaces, using the concept of a measure DefinitionProbability is a way of expressing knowledge or belief that an event will occur or has occurred. Probability theory is applied in everyday life in risk assessment and in trade on commodity markets Probability and FormulasProbability of Single EventThe probability of single event A is written as P(A), p(A) or Pr(A) Single Event Complement ProbabilityThe opposite or complement of an event A is the event that is, the event of A not occurring; its probability is given by the formula Joint Probability of Multiple EventsIf both events A and B occur on a single performance of an experiment, this is called the intersection or joint probability of A and B, denoted as P(A n B). If two events, A and B are independent then the joint probability can be derived from the formula Probability of Mutually Exclusive EventsIf either event A or event B or both events occur on a single performance of an experiment this is called the union of the events A and B denoted as P(A U B). If two events are mutually exclusive then the probability of either occurring can be derived from the formula Conditional ProbabilityConditional probability is the probability of some event A, given the occurrence of some other event B. Conditional probability is written P(AB), and is read the probability of A, given B. It can be derived from the formula

