Probability of a single event
A is the probability of writing a single event as P(A), p(A) or Pr(A)
Single event supplement probability
The opposite or supplementary event A is an event, event A does not occur, and its probability is given by P(not A) = 1 - P(A)
Input data: impossible result -n:5; number of events did not occur n(A): 4 Output result: probability of occurrence of event P(A): 0.8; probability of event not occurring P(A'): 0.2
The number of events did not occur less than the impossible result.
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