Resposta :
a) Espaço amostral : {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20}
Evento : {2, 3, 5, 7, 11, 13, 17, 19}
a) Espaço amostral : {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20}
Evento : {2, 3, 5, 7, 11, 13, 17, 19}