The principle of redundancy is used when system reliability is improved through redundant or backup components. a region's government requires that commercial aircraft used for flying in hazardous conditions must have two independent radios instead of one. assume that for a typical flight, the probability of a radio failure is 0.00440.0044. what is the probability that a particular flight will be threatened with the failure of both radios? describe how the second independent radio increases safety in this case.