I have this error, "Oops, try again. get_class_average([alice]) returned 80.55 instead of 91.15 as expected". Can somedoby help me with solve this?

This is my code:

```
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=float(sum(numbers))
return total/len(numbers)
def get_average(student):
homework=0.1*average(student["homework"])
quizzes=0.3*average(student["quizzes"])
tests=0.6*average(student["tests"])
return homework+quizzes+tests
def get_letter_grade(score):
if score >=90:
return "A"
if score >=80:
return "B"
if score >=70:
return "C"
elif score >=60:
return "D"
else:
return "F"
students=[lloyd,alice,tyler]
def get_class_average(studnets):
results=[]
for student in students:
av=get_average(student)
results.append(av)
print results
class_av=average(results)
return class_av
return class_av
```