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古典概型的概念及概率

> 一个三位数字的密码锁，每位上的数字都在0到9这十个数字中任选，某人忘记了密码最后一个号码，那么此人开锁时，在对好前两位数码后，随意拨动最后一个数字恰好能开锁的概率为（　　） A． 1 103 B． 1 102 C． 1 10 D． 1 1000

问题：

发布时间：2024-09-09

一个三位数字的密码锁，每位上的数字都在0到9这十个数字中任选，某人忘记了密码最后一个号码，那么此人开锁时，在对好前两位数码后，随意拨动最后一个数字恰好能开锁的概率为（　　）

A．

1

103

B．

1

102

C．

1

10

D．

1

1000

参考答案：

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一个三位数字的密码锁，每位上的数字都在0到9这十个数字中任选，某人忘记了密码最后一个号码，那么此人开锁时，在对好前两位数码后，随意拨动最后一个数字恰好能开锁的概率为（ ） A． 1 103 B． 1 102 C． 1 10 D． 1 1000

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