My code could work but the result of score was wrong (all students were "A").

Where lacked something please let me know.

Thanks.

80< score <90 should be "B"

```
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]
}
students=[lloyd,alice,tyler]
# Add your function below!
def average(numbers):
total = sum(numbers)
total = float(total)
return float(total)/len(numbers)
def get_average(student):
homework = average(student["homework"])
quizzes = average(student["quizzes"])
tests = average(student["tests"])
#print sum((0.1*homework,0.3*quizzes,0.6*tests))
return sum((0.1*homework,0.3*quizzes,0.6*tests))
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"
for key in students:
print key["name"]
print "average:" ;print get_average(key)
print "score:"
print get_letter_grade(key)
```

The result showed

Lloyd

average:

80.55

score:

A

Alice

average:

91.15

score:

A

Tyler

average:

79.9

score:

A

None