I get the following error message:

Oops, try again. get_class_average([alice, lloyd]) returned 91.15 instead of 85.85 as expected

I'm not able to understand what i've done wrong. Can you please help me?

```
lloyd = {
"name": "Lloyd",
"homework": [90.0, 97.0, 75.0, 92.0],
"quizzes": [88.0, 40.0, 94.0],
"tests": [75.0, 90.0]
}
alice = {
"name": "Alice",
"homework": [100.0, 92.0, 98.0, 100.0],
"quizzes": [82.0, 83.0, 91.0],
"tests": [89.0, 97.0]
}
tyler = {
"name": "Tyler",
"homework": [0.0, 87.0, 75.0, 22.0],
"quizzes": [0.0, 75.0, 78.0],
"tests": [100.0, 100.0]
}
# Add your function below!
def average(numbers):
total=sum(numbers)
total=float(total)
total_new=total/len(numbers)
return total_new
def get_average(student):
homework=average(student["homework"])
quizzes=average(student["quizzes"])
tests=average(student["tests"])
return 0.1* average(student["homework"]) +\
0.3* average(student["quizzes"]) + \
0.6* average(student["tests"])
def get_letter_grade(score):
if score >=90:
return"A"
elif score>=80:
return"B"
elif score>=70:
return "C"
elif score>=60:
return "D"
else:
return "F"
print get_letter_grade(get_average(lloyd))
def get_class_average(students):
results=[]
for student in students:
avg=get_average(student)
results.append(avg)
return average(results)
```