?Redundancy in Stadium Generators Large stadiums rely on backup generators to provide

Chapter 4, Problem 22

(choose chapter or problem)

Redundancy in Stadium Generators Large stadiums rely on backup generators to provide electricity in the event of a power failure. Assume that emergency backup generators fail  22% of the times when they are needed (based on data from Arshad Mansoor, senior vice president with the Electric Power Research Institute). A stadium has three backup generators so that  power is available if at least one of them works in a power failure. Find the probability of having at least one of the backup generators working given that a power failure has occurred. Does  the result appear to be adequate for the stadium’s needs?