21. In ___________ models there is risk and uncertainty.
22. ___________ models are obtained by enlarging or reducing the size of the item.
23. Operations Research attempts to find the best and __________ solution to a problem.
24. The word __________ may be defined as some action that we apply to some problems or hypothesis.
25. The operations Research technique, specially used to determine the optimum strategy is.
26. ___________ are the representation of reality.
27. ___________ are called mathematical models.
28. Probabilistic models are also known as.
29. ____________ models assumes that the values of the variables do not change with time during a particular period.
30. A _____________ models considers time as one of the important variable.
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