最新提问
我的动态
登录后查看动态
题目内容双击单词支持查询和收藏哦～
A telephone system has $$n$$ telephone lines. For each of the $$n$$ lines, the event that the line will fail during a certain reliability test has probability $$0.3$$, and these $$n$$ events are independent. If the probability that at least one of the $$n$$ lines will not fail during the reliability test is greater than $$0.99$$, what is the minimum value of $$n$$?
C显示答案
· 相关考点
6.4.3 独立事件
6.4.3 独立事件
以上解析由 考满分老师提供。
