In the past, 30% of the students at ABC University were in the Business College, 30% of the students were in the Liberal Arts College, and 40% of the students were in the Education College. To see whether the proportions have changed, a random sample of 300 students from ABC University was selected. Of the sample students, one hundred are in the Business College, 120 are in the Liberal Arts College, and 80 are in the Education College. If the proportions are the same as they were in the past, the expected frequency for the Business College is _____. a. 0.40 b. 0.30 c. 90 d. 100