I'm getting a error message saying "get_class_average ([alice]) return 83.86 instead of 91.15. when I run her score individually it shows her having a average grade of 91.15? - where is my error?

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": [00.0, 87.0, 75.0, 22.0],

"quizzes": [00.0, 75.0, 78.0],

"tests": [100.0, 100.0]

}

def average(numbers):

t = sum(numbers)

x = len(numbers)

v = float(t) / float(x)

return v

def get_average(student):

hom = average(student["homework"])

qzz = average(student["quizzes"])

tes = average(student["tests"])

s_avg = (hom * 0.10) + (qzz * 0.30) + (tes * 0.60)

return s_avg

print"Alice has"

print (get_average(alice))

print

print"Lloyd has"

print (get_average(lloyd))

print

print"Tyler has"

print (get_average(tyler))

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"

elif score < 60:

return "F"

def get_class_average(everyone):

grades = 0

for values in students:

grades += get_average(values)

class_average = grades / len(students)

return class_average

students = [lloyd, alice, tyler]

print

print "The class average is: "

print get_class_average(students)