1. A collection of individuals or items selected without any specific pattern or predetermined criteria
The survey was conducted with a random group of participants from different backgrounds.
A pesquisa foi conduzida com um grupo aleatório de participantes de diferentes origens.
2. In mathematics and statistics, a set of elements chosen by random selection methods
The researcher selected a random group of 100 students from the university population.
O pesquisador selecionou um grupo aleatório de 100 alunos da população universitária.