TY - JOUR T1 - Penneyove hry a ich zovšeobecnenie A1 - Krech, Ireneusz JA - Obzory matematiky, fyziky a informatiky Y1 - 2007 VL - 36 IS - 2 SP - 1 EP - 7 SN - 1335-4981 N2 - We deal with countable probability spaces considered as stochastic models of multistage experiments, where the number of stages is random. Using various elementary approaches, we determine the corresponding probability functions. ER -