The student section doesn't take up half of The Bram (approx 13k??). I would say 5,000 is closer to the answer. Maybe even a little bit under, as some of that baseline seating is for student-athletes/recruits etc.
I read the question as BMW was trying to ascertain how many regular season tickets there were by subtracting the students. Also when it is KU gameday the students do literally take up 1/2 of the bram. So either those seats on the curve are normally sold as single game tickets for every game but that one or the ticket dept uses the number of students to determine how much of that section goes to students and how much goes to regular season ticket holders. 
More like 2/5 to 1/3 (2/6 for mathematically challenged)
iirc, students start/end at the end with the tarp. cut the court in half long ways and start wrapping around the corner. then it starts/ends at approx the opposite baseline (if baseline extended into stands). if it went all the way to the other end (where the band sits I think) it would be half, but it stops before then so it's clearly not half. Also, the loge boxes are on the student side so that means "aint as many seats" on the student side
Also, Curry said 4,000 students in one of his speeches recently, but not sure if that's hard evidence
Wonder what propaganda BMW is cooking up??? Hopefully it makes mention of the Orange Bowl and a second round draft pick of some guy [actually drafted in the fifth round]
