this error is shown ---- get_class_average([alice]) returned 83.8666666667 instead of 91.15 as expected

```
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]
}
students=[lloyd, alice, tyler]
# Add your function below!
def average(numbers):
total=sum(numbers)
total=float(total)
return total/len(numbers)
def get_average(student):
quizzes=average(student['quizzes'])
homework=average(student['homework'])
tests=average(student['tests'])
return tests*0.6+homework*0.1+quizzes*0.3
def get_letter_grade(score):
if score>=90:
return 'A'
elif score>=80 and score<90:
return 'B'
elif score >=70 and score<80:
return 'C'
elif score >=60 and score<70:
return 'D'
else:
return 'F'
print get_letter_grade(get_average(lloyd))
def get_class_average(students):
results=[]
for x in students:
results.append(get_average(x))
return average(results)
```