1) I keep getting this error and I don't get it: **Oops, try again.** get_class_average([alice]) returned 83.8666666667 instead of 91.15 as expected

My code is

# Add your function below!

```
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)
return total/len(numbers)
def get_average(student):
homework = average(student["homework"])
quizzes = average(student["quizzes"])
tests = average(student["tests"])
return 0.1*homework + 0.3*quizzes + 0.6*tests
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 score
print get_letter_grade(get_average(lloyd))
def get_class_average(students):
students = [lloyd, alice, tyler]
results = []
results.append(get_average(students[0]))
results.append(get_average(students[1]))
results.append(get_average(students[2]))
return average(results)
```

2) A list called "class" is mentioned in the instructions. I don't get it. Isn't "students" the only list I should be making?

3) I've seen other topics and still couldn't understand what I'm supposed to change. One thing that I find weird is that in many answers people are telling to use a "for" loop, like that:

for **student** in **students**

How does that work? I've never created a variable, list or dictionary called "student". How is the program suddenly going to understand that?