error:

4.0

Traceback (most recent call last):

File "python", line 50, in

File "python", line 43, in get_letter_grade

NameError: global name 'C' is not defined

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]

}

# Add your function below!

def average(numbers):

total=sum(numbers)

total=float(total)

return(total/len(numbers))

numbers=[2,4,6]

print (average(numbers))

student=[lloyd,alice,tyler]

def get_average(student):

for i in student:

a=average(student["homework"])

b=average(student["quizzes"])

c=average(student["tests"])

total=(a*0.10)+(b*0.30)+ (c*0.60)

return(total)

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 get_letter_grade(get_average(tyler))

def get_class_average(students):

results=[]

students=["Lloyd","Alice","Tyler"]

for student in students:

a=get_average(student)

results.append(a)

return average(results)