Chaachoui Ghizlane, El Khomssi Mohammed, Modelings of Microeconomic Structures Using a Probablistic Approche, Journal of Engineering and Applied Sciences, Volume 14,Issue 3, 2019, Pages 993-1000, ISSN 1816-949x, jeasci.2019.993.1000, (https://makhillpublications.co/view-article.php?doi=jeasci.2019.993.1000) Abstract: Given m Microeconomic Structures (MS) and n individuals, on the basis of their will, a random or conditional assignment, we will give the probability laws characterizing the distributions of these individuals in those structures also we will use the definition of the factorial moment, the number of stirling and some classic results that link the factorial moment to the high order moment. Keywords: Modelings of Microeconomic Structures Using a Probablistic Approche