Since There are 5 people getting an A in 35, 5/35 = 1/7
You can calculate decimal yourself.
Note that this may be incorrect. From a mathmatical point of view, no, but in real life, yes.
Grades are too hard to calculate. THere are WAY too much variables.
A einstein kid could be depressed and get a D.
A idiotic kid could have bribed a teacher and gotten an A.
Thus you must note that this is theoretical probability based on information given, and strictly this. This probability can change year to year, trimester to trimester, or even day to day!
A straight A kid can flunk a test and get a F since his friend betrayed him.
You never know.