I didn't change the old code. Just define a function get_class_average()

```
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)
return float(total) / len(numbers)
def get_average(student):
student["homework"] = average(student["homework"])
student["quizzes"] = average(student["quizzes"])
student["tests"] = average(student["tests"])
return (student["homework"] * 10 + student["quizzes"] * 30 + student["tests"]*60) / 100
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"
# Addional function
def get_class_average(students):
results = []
for student in students:
results.append(get_average(student))
return average(results)
```

# ==> And receive a notification:

Oops, try again. lloyd does not seem to contain the correct dictionary, it should contain: {'quizzes': [88.0, 40.0, 94.0], 'tests': [75.0, 90.0], 'name': 'Lloyd', 'homework': [90.0, 97.0, 75.0, 92.0]}