MATH（ENGLISH）A certain company decided to save money by buying discount computer network servers.Each of the 10 servers has a probability of running well 91% of the time.What is the probability of at least one of the servers working well?(to 2 decimal places)
问题描述：
MATH（ENGLISH）
A certain company decided to save money by buying discount computer network servers.Each of the 10 servers has a probability of running well 91% of the time.What is the probability of at least one of the servers working well?(to 2 decimal places)
答
first calculate the probability of all servers are not running well,it is 0.09^10the probability of at least one working well is 1-0.09^10 仅供参考,统计的东东早忘了,不太确定.