S.V. Gadetskaya, V.Ju. Dubnitsky

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The concept of the bilaterally truncated probabilistic distributing is entered, used is entered at statement of the problems connected to definition of reliability of systems, by calculation of size of the losses caused man-caused by accidents and calculation of risks of financial operations. Put and grounded task of determination of numerical descriptions of the bilaterally truncated distributing, the general method of its decision is resulted. The expected value and dispersion of the bilaterally truncated exponential distributing is certain, expected value bilaterally truncated gamma density and distributing of Weibull.