Information Technology in Combinatorics and Modelling of Random Quantities

The article considers possibilities of information technologies in combinatorics, as well as in computer modeling of random quantities. Decisions are made to deal with the consequences of any natural disaster, depending on many random factors. The article considers peculiarities of solving probabilistic problems inherent in the process of liquidation of a natural disaster, which consist in that the solution is greatly facilitated when using combinatorial formulas. Each combinatorial formula determines the number of possible outcomes in some process (experience) consisting in the random selection (at random) of M elements (variants, methods) from N of the various elements of the given set. The basic principle and basic formulas of combinatorics, which are formulas of dispositions, permutations and combinations, are considered.The features of computer modeling of combinatorial formulas in the form of a program for computers are considered in detail.The article also considers features of computer simulation of random quantities, including algorithmic method of obtaining random numbers. The algorithm of obtaining uniformly distributed pseudorandom numbers, which is implemented as a program for computers, is resulted.