Part of a Whole results don't make sense


#1


https://www.codecademy.com/courses/python-beginner-en-qzsCL/1/5?curriculum_id=4f89dab3d788890003000096

My entire code was approved but prints grade A for all students including Lloyd, who should be receiving B (80.55) and then prints class average as B.

A
A
A
83.8666666667
B
None


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)

def get_average(student):
    homework=average(student["homework"])
    quizzes=average(student["quizzes"])
    tests=average(student["tests"])
    return homework*0.10+quizzes*0.30+tests*0.60

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(lloyd)
print get_letter_grade(alice)
print get_letter_grade(tyler)
        

def get_class_average(students):
    results=[]
    for student in students:
        results.append(get_average(student))
    return average(results)

        
print get_class_average(students)
print get_letter_grade(average(results))


#2

You are yet to define your students list.

Also, this line is faulty.

You should be printing the result of get_letter_grade for the get_class_average of students.


#3

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