SAT Mathematics Practice Test 4

Because Nick surveyed a random sample of the freshman class, his sample was representative of the entire freshman class. Thus,the percent of students in the entire freshman class expected to prefer the Fall Festival in October is appropriately estimated by the percent of students who preferred it in the sample, $25.6\%.$ Thus, of the $225$ students in the freshman class, approximately $225\times 0.256=57.6$ students would be expected to prefer having the Fall Festival in October. Of the choices given, this is closest to 60.
Choices A, C, and D are incorrect. These choices may be the result of misapplying the concept of percent or of calculation errors.