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)

x = total /len(numbers)

return x

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'

def get_class_average(students):

results = []

for student in students:

results.append(get_average(student))

average(results)

return results

print get_class_average([alice])

I get output:

[91.149999]

and error is:

Oops, try again. get_class_average([alice]) should return a number