Consulte Graatis
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Questão de agrupamento, Analise combinatoria
17. Determinado Banco adota as seguintes regras, para que o usuário monte sua senha:
i. A senha tem que ser formada por 4 dígitos distintos;
ii. O primeiro dígito não pode ser zero;
iii. O último dígito é ímpar.
Com essas condições, o número total de senhas que o usuário pode montar é igual a
A) 5.040.
B) 1.680.
C) 2.240.
D) 2.520
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