The answer is 7 students in the group neither take German nor Italian.
That is because 8 students that take Italian + the 12 that take German, and + the 3 student that take both = 23 students.
Since they are 30 students in total and 23 students that take either German, Italian, or both, you subtract the 23 students from the total 30, leaving you with 7 students who neither take German not Italian.
I hope this helps, cause then again idek