Virtually real technology finds numerous applications in the world of business and industry too. With the help of simulation, which is an integral part of this technology, new prototypes and products can be built. CAD, CAM, and other mathematical and engineering techniques, which belong to the domain of virtual reality, are widely used in the automobile, naval, the aerospace and in other manufacturing industries to enable the building of cars, ships, airplanes and machines. Operations research, mathematical modeling, statistical methods, optimization strategies, decision-tree methods, and simulation are some techniques that are commonly used to enable accurate decision-making. These techniques devise near-real situations and seek the optimum solutions in those near-real situations so that those solutions may be applied in reality for solving operational problems and easing bottlenecks. The theory of probability in Mathematics is a way of determining whe...