TY - JOUR T1 - Pravdepodobnosť a symetria A1 - Płocki, Adam JA - Obzory matematiky, fyziky a informatiky Y1 - 2002 VL - 31 IS - 3 SP - 20 EP - 29 SN - 1335-4981 N2 - Construction and research of probability spaces is the objective of theory of probability. Certain method of construction of such spaces is discussed in this paper, focusing on symmetries as the base for consequences related to probability. Symmetries allow us to rationalize "doing mathematics", while they reduce complicated calculations to simple conclusions. The author conjectures that the ideas presented here can be successfully adopted for use in probability classes in different grades. ER -