Hi.

I'm having problems with this code, I have performed following the instructions but is giving error.

My complete 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]
}
# Add your function below!
def average (numbers):
if len (numbers) > 0:
total = float (sum (numbers))
return total / len (numbers)
else:
return 0
def get_average (student):
homework = average ( student ["homework"])
quizzes = average ( student ["quizzes"])
tests = average ( student ["tests"])
return homework * 0.1 + quizzes * 0.3 \
+ tests * 0.6
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_class_average ( [lloyd, alice, tyler])
def get_class_average (studens):
results = []
for student in students:
results.append ( get_average (student))
print results
return average (results)
```

But I'm getting:

Oops, try again. get_class_average([alice]) returned 83.8666666667 instead of 91.15 as expected

The output is:

[80.55, 91.14999999999999, 79.9]

83.8666666667

None