TABLE 7-4 According to a Survey,only 15% of Customers Who Visited the Visited

TABLE 7-4
According to a survey,only 15% of customers who visited the website of a major retail store made a purchase.Random sample sizes of 50 are selected.
-A study at a college in the west coast reveals that,historically,45% of the students are minority students.If a random sample size of 75 is selected,the probability is ________ that between 30% and 50% of the students in the sample will be minority students.