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In a risk analysis, we almost never have a finite sample space of outcomes that occur with the same probability. The classical approach to probability is therefore not appropriate. Furthermore, to apply the frequentist approach, we must at least be able to imagine that experiments can be repeated a large number of times under nearly identical conditions. Because this is rarely possible, we are left with a final option, the Bayesian approach. In this approach, the probability is considered to be subjective and is defined as: