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In other words, its a possibility of expected event to occur based on the occurrence of previous event.įormulas to Remember Formula to calculate probability of events P(A U B) = P(A) + P(B), if the events are mutually exclusiveĬonditional probability is the measure of probability of an event A given that the event of B has already occurred. In probability & statistics, the Union of two events A and B in the sample space S is all the events of A or B or both, and is generally represented by A U B. In probability & statistics, the Intersection of two events A and B in the sample space S is the events that are common to A and B, and is generally represented by A ∩ B. For example, it is not possible to get both HEAD & TAIL, when a coin is tossed. The events are said to be disjoint or mutually exclusive, if two events A and B that can not both occur at the same time or it does not have any common elements. The two events A and B are said to be mutual, if the sample space has at least one element in common to events A and B. Tossing a coin or throwing a dice are the examples of independent events. In other words, the product of probability of events A and B equals to probability of intersection of events A and B. In probability & statistics, if an event A is said to be independent then it does not affect the outcome of event B where A and B are the two events of sample space S. The Complement of Event A is generally represented by A’ and is a subset of all elements or events of S that are not in A, and it can be calculated from Each outcome of a sample space is called as element or member or sample point of a sample space. The Sample Space of an statistical experiment is the set of all possible outcomes and is generally represented by an alphabet S. The probability of event in the sample space is always lies between 0 and 1, mathematically represented as (0 ≤ p(A) ≤ 1). It is a study and interpretation of chance of outcomes in the sample space of statistical experiments. Probability is a mathematical function or method used in the context of probability & statistics represents the possibility of events to occur, generally measured by the ratio of favorable events to the total number of events possible. Probability of n(A) = 13, n(B) = 4 from n = 52.

Probability for 52 Mondays in Leap Year.