Hi everybody.

I wrote this 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]
}
students=[lloyd, alice, tyler]
# Add your function below!
def average(numbers):
total=sum(numbers)
total=float(total)
total=total/len(numbers)
return total
def get_average(student):
homework=average(student["homework"])
quizzes=average(student["quizzes"])
tests=average(student['tests'])
homework=homework*10/100
quizzes=quizzes*30/100
tests=tests*60/100
work=homework+quizzes+tests
return work
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_average(lloyd))
def get_class_average(students):
results=[]
for student in students:
results.append(get_average(student))
return average(results)
print(get_class_average(students))
```

and the output is:

```
80.55
83.8666666667
None
```

the code was for the How is Everybody Doing? exercise but I have this "Oops, try again." error: