Redundancy in Hospital Generators 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 hospital 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 hospital’s needs?