"How is Everybody Doing?"

Oops, try again. One of the following is missing or broken when we tried to use it: alice, lloyd, tyler, students, get_class_average, get_letter_grade

Can not figure where is the error...

```
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))
total = total / len(numbers)
return total
def get_average (student):
homework = average(student["homework"])
quizzes = average(student["quizzes"])
tests = average(student["tests"])
return ((homework * 10 /100) + (quizzes *30 /100) + (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"
return "F"
print get_letter_grade (get_average(lloyd))
def get_class_average (students):
results=[]
for x in students:
res = get_average(x)
results.append(res)
return average(results)
i = get_class_average([lloyd, alice, tyler])
print i
print get_letter_grade (i)
```