<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)

final = total / len(numbers)

return final

students = [lloyd, alice, tyler]

def get_average(student):

homework = average(students["homework"])

quizzes = average(students["quizzes"])

tests = average(students["tests"])

# quizzes = quizzes * 0.3

# tests = tests * 0.6

```
weight= (homework * 0.1) + (quizzes * 0.3) + (tests * 0.6)
return weight
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(lloyd)
```

def get_class_average(students):

results = []

for student in students:

results.append(get_average(student))

return average(results)

ERROR: Oops, try again. get_class_average([alice]) resulted in an error: list indices must be integers, not str

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```