Software that can be used to detect fraund in customer
phonecards, tracks the number of metropolitan areas from which
callsoriginate each day. suppose 1% of the legitimate users
originatecalls from two or more metropolitan areas in a single day;
and 30%of fradulent users originate calls from two or more
metropolitanarea in a single day. the overall proportion of
fraudulent users is0.01%. if the same person originates calls from
two or moremetropolitan areas in as ingle, what is probability that
such useis fraudlent?