there are a large number of genetically based blood group systems that have been used for typing blood. two of these are the rh system (with blood types rh and rh-) and the kell system (with blood types k and k-). it is found that any person's blood type in any one system is independent of his or her blood type in any other. it is known that, for europeans in new zealand, about 81% are rh and about 8% are k . if a european new zealander is chosen at random, what is the probability that he or she is either positive in both systems or negative in both systems?
