Part of the whole, no syntax error but still returning the wrong thing


#1



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


Oops, try again. get_class_average([alice]) resulted in an error: string indices must be integers, not str


A) I don't understand what the error is
B)How do I fix it

    "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)
    total=float(total)/len(numbers)
    return total
def get_average(student):
    homework=average(student["homework"])
    quizzes=average(student["quizzes"])
    tests=average(student["tests"])
    total=0.1*homework+0.3*quizzes+0.6*tests
    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"
get_letter_grade(get_average(lloyd))
def get_class_average(students):
    results=[]
    for student in group:
        results.append(get_average(student))
    return average(results)






#2

Make sure you're getting the values out of each student, not just the names of the students.


#3

Here:

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

Don't you mean:

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

#4

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