ISSN 2347-1921 3230 | Page March 04, 2015 Tri-generative Stochastic Model of Population Growth Ajinkya Gavane 1 , Rahul Nigam 2 , Sudarshan Ghonge 3 Department of Physics/ BITS Pilani Hyderabad Campus, Shameetpet Mandal, Hyderabad – 78 2 rahul.nigam@hyderabad.bits-pilani.ac.in 1 f2011527@ hyderabad.bits-pilani.ac.in 3 f2011230@ hyderabad.bits-pilani.ac.in ABSTRACT This paper investigates the population growth of a certain species in which every generation reproduces twice. First we probe the cases of 100% regeneration. We find that the population stabilizes for all the case although the stable values are different and exhibit interesting patterns. Then we study the survival period of a species by randomizing the reproduction probabilities within a window at same predefined ages. Now the population meets three different possibilities when left over for long periods – Dies, Stabilizes, Shoots up. We carry out a detail study for these outcomes in the parameter space defined by the reproduction probabilities. Indexing terms/Keywords Population Growth; Probability Space; Random Probability Academic Discipline And Sub-Disciplines Mathematics, Stochastic Modeling Council for Innovative Research Peer Review Research Publishing System Journal: JOURNAL OF ADVANCES IN MATHEMATICS Vol .10, No. 2 www.cirjam.com , editorjam@gmail.com