Affirmative action in the United States tends to focus on issues such as education and employment, specifically granting special consideration to racial minorities, Native Americans, and women who have been historically excluded groups in America. Reports have shown that minorities and women have faced discrimination in schools and businesses for many years and this discrimination produced unfair advantages for whites and males in education and employment. The impetus toward affirmative action is redressing the disadvantages associated with past and present discrimination. Further impetus is a desire to ensure public institutions, such as universities, hospitals, and police forces, are more representative of the populations they serve. Studies showed that discrimination in both business sectors and education resulted in advantages for what group of people? If you can't find the answer, please respond "unanswerable".
whites and males
The context states that discrimination in both the business sectors and education resulted in advantages for whites and males. This can be observed from reports which state minorities and women have faced discrimination in schools and businesses, while white males have not been discriminated against. 
Thus, based on this information provided by the passage, it is clear that studies showed that discrimination benefited whites and men specifically over other groups of people such as racial minorities or Native Americans..