For definition of likelihood characteristics of failures, fires, explosions frequently it is necessary to define probability of simultaneous occurrence of 2 and more independent events (for example, occurrences of the combustible environment and an ignition source). Thus for definition of probability of simultaneous occurrence of independent events within a year in some techniques the formula of multiplication of probabilities is used. In article the doubt in adequacy of such principle as it, according to the author, overestimates total probability in comparison with results of stochastic modeling is stated. Other analytical dependence Is offered*.
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