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)

return float(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 and score<90:

return "B"

elif score>=70 and score<80:

return "C"

elif score>=60 and score<70:

return "D"

else:

return "F"

students = [lloyd, alice, tyler]

def get_class_average(students):

results = []

for student in students:

results.append(get_average(student))

return results

print get_class_average(students)

The output is: [80.55, 91.14999999999999, 79.9]

But also error displayed: Oops, try again. get_class_average([alice]) should return a number

May be I didn't undersood the question? Thanks.