64% of all Americans live in cities with population greater than 100,000 people. If 44 Americans are randomly selected, find the probability that a. Exactly 30 of them live in cities with population greater than 100,000 people. b. At most 30 of them live in cities with population greater than 100,000 people. c. At least 30 of them live in cities with population greater than 100,000 people..