Arecent poll showed that 60% of the residents of the city of renton are democratic. a television reporter would like to interview a local democrat about an upcoming election. if the reporter begins randomly asking people on the street, what is the probability that he will find a democrat by the third person he stops?

Finding a democratic person by the third interview means that  we get first a republican with a probability of 1-0.6=0.4, then  again a second republican with a probability of 0.4, and finally  we find a democratic at the third step with   a probability of 0.6.  in order to find the final probability, simply multiply all the above  values: answer the probability is  0.096