Lactose intolerance
Lactose intolerance affects about 20% of non-Hispanic white Americans, 50% of Hispanic Americans, and 75% of African, Asian, and Native Americans (Source: Jean Carper, "Eat Smart," USA Weekend). Seventy-six percent of U.S. residents are non-Hispanic whites, 9% of them are Hispanic, and 15% are African, Asian, or Native American. If a person is selected from this group of people, what is the probability that the person will have lactose intolerance?