Help plz ......

Ok i was in middel school in grade 8 and one day my princpail called my parents and my princpail gave my parents a list of course to take in high school and the list said


10-1
20-1
30-1

and it said university


other one said


10-2
20-2
30-2


and it said collge


and other one said

10-3
20-3
30-3

and it said workforce



so the list is over.......😃


And they said to my parents that in grade 9 she will do some course
and the princepail will se how iam working and what is my percent
and after they see my percent they will put me into the course like maybe 10-1
20-1
30-1 or

10-2
20-2
30-2

10-3
20-3
30-3


so what kind of percent do i need to bring in my exams
so they will put me into

10-1
20-1
30-1
or

10-2
20-2
30-2


if anyone can help me plz it will be great

and what i 10-1 20-1
what are this all numbers