Question

An event which represents the occurrence of either a or b or both

Answer 1

The complement of an event is theevent not occurring. The probability that Event A will not occur is denoted by P(A'). The probability that Events A and B both occur is the probability of the intersection of A and B. The probability of the intersection ofEvents A and B is denoted by P(A ∩ B).

Answer 2

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The union of two events is expressed by the "or" function. For example, the probability that either Event A or Event B (or both) will occur is expressed by P(A or B). The intersection of twoevents is the probability that both events will occur and is expressed by the "and" function.