Who's the boss? The 2000 Census revealed that 26% of all firms in the United States are owned by women. You call some firms doing business locally, assuming that the national percentage is true in your area.
a) What's the probability that the first 3 you call are all owned by women?
b) What's the probability that none of your first 4 calls finds a firm that is owned by a woman?
c) Suppose none of your first 5 calls found a firm owned by a woman. What's the probability that your next call does?