Question

The reliability of a system with n redundant components and a reliability of r is ____________

(a) 1-(1-r)n

(b) 1-(1+r)n

(c) 1+(1-r)n

(d) All of the mentioned

The question was asked in quiz.

The origin of the question is Laws of Cloudonomics topic in division Value Proposition of Cloud of Cloud Computing

Answer 1

Right choice is (a) 1-(1-r)n

The best explanation: Therefore, when a datacenter achieves a reliability of 99 percent, two redundant data centers have a reliability of 99.99 percent (four nines) and three redundant data centers can achieve a reliability of 99.9999 percent (six nines).