According to the U.S. Census Bureau, 2011 American Community Survey, the percentage of college undergraduates who work full- time (27-49 weeks per year) is about 30%. Consider a random sample of 100 students, and let the random variable x be the number of students who work full time. a What is probability that at most 30 students work full time? b . Describe how to calculate the probability for more than 30 students working full time, using part A.
