I have search whole internet,every single page of my book.I ask my friends i didn't find everywhere a solution of this exercise and i can't understand what distribution is .The exercise says:
One internet company have 4 servers.
The 2 servers there is the database.
The other 2 servers are running the software.
The possibility of something goes wrong, in every server is 1%(for the next year).We know that every server is independent(meaning if 1 server doesn't work well,it will not influence the other server).If the internet company ,must working properly ,must working at least 1 from the servers of database and at least 1 server from the running of the software.What is the possibility of working properly the internet company the next year?
Thanks in advance.If someone can solve it and explain me what it is i am greatful.My mind can't think is Posion,nor Bernuli,not Geometry etc.Is this a distribution?