Question

请问大家下面的这道英文数学题怎么翻译理解，谢谢大家了。

An ATM password at Fred's Bank is composed of four digits from 0 to 9 , with repeated digits allowable. If no password may begin with the sequence 9，1，1，then how many passwords are possible?

Answer 1

An ATM password at Fred's Bank is composed of four digits from 0 to 9 , with repeated digits allowable. If no password may begin with the sequence 9，1，1，then how many passwords are possible?
翻译之后，他的意思就是：
弗雷德银行的ATM机密码是由0到9四个数字组成的，允许重复数字。如果没有一个密码是以9，1，1开头的，那么有多少个密码是可能的？