For the 2009-2010 academic year, 2300 students applied to W. University. The average SAT score for all students applying was 1300 with a standard deviation of 100. If you take a random sample of 400 students who applied to the university, what is the probability that more than 15% of the students in your sample had an SAT score above 1400?
I can't figure out what to do. Any help, please?