How'd they do?
About how you would expect an 19 year-old to do when all his expenses are paid for by someone else ... they generally slept in and could have phoned in their few accomplishments.
When I taught on university-level business courses, my Saudi students, and my Arab Muslim students in general, cared exactly NOTHING about learning anything except possibly conversational, American-style English. To the best of my knowledge, they just pooped away their days except for spending time acquiring large amounts of consumer goods. They did very poorly yet felt entitled to good grades for no reason at all. Other Muslim students in my classes such as Pakistanis and Bosnian Muslims were often quite good students and cared about learning.