# 9/9 Oops, try again. One of the following is missing or broken when we tried to use it:

#1

"alice, lloyd, tyler, students, get_class_average, get_letter_grade"

The code executes and displays correct results as follows:
Lloyd 80.55
Alice 91.15
Tyler 79.9
Class Average: 83.8666666667
Class Average Grade: B
None

## Here is the 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]
}

def average(numbers):
total = sum(numbers)
avg = float(total) / len(numbers)
return avg

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

if score >= 90:
return "A"
elif score >= 80:
return "B"
elif score >= 70:
return "C"
elif score >= 60:
return "D"
else:
return "F"

def get_class_average(students):
results = []
for x in students:
result = get_average(x)
print x["name"], result
results.append(result)
#        print results
return average(results)

class_students = [lloyd, alice, tyler]
class_average = get_class_average(class_students)