notenspiegel = [1,2,2,1,1,3,1,2,3,4,1,2,1,1,1,1]
num_students = 0
num_students_failed = 0
sum_grades = 0

for i in range(16):
    num_students = num_students + notenspiegel[i]
    sum_grades = sum_grades + (notenspiegel[i] * i)

for i in range(4):
    num_students_failed = num_students_failed + notenspiegel[i]

average = round(float(sum_grades/num_students),1)
failed = round(float(num_students_failed/num_students)*100,1)

print("Durchschnitt: ",average)
print("Unter Schnitt: ",failed,"%")