Mathematical Expectation: Conceptual Difficulties Among Students . Journal of Educational and Social Research, London, U.K., v. 14, n. 4, p. 298, 2024. DOI: 10.36941/jesr-2024-0104. Disponível em: https://www.richtmann.org/journal/index.php/jesr/article/view/13897.. Acesso em: 27 jul. 2024.