A representative from National Football League's Marketing Division randomly selects people on a random street in Seattle, WA until he finds a person who attended the NFC Championship game. Let p, the probability that he succeeds in finding such a person, equal 0.30. And, let X denote the number of people he selects until he finds his first success.
a. What is the probability that the marketing representative must select 4 people before he finds one who attended the last home football game?
b. What is the probability that the marketing representative must select more than 6 people before he finds one who attended the last home football game?