<PLEASE USE THE FOLLOWING TEMPLATE TO HELP YOU CREATE A GREAT POST!>

Hi, Im not passing even tough I get the results

Im supposed to get ( I tested the input which the console returns me

with a error message). I dont find a mistake… Any suggestions?

<Below this line, add a link to the EXACT exercise that you are stuck at.>

Oops, try again.

grades_variance([8, 5, 6, 8, 0, 5, 6, 3, 7]) returned 5644.2473701512 instead of the expected: 5.7777777778

<What do you expect to happen instead?>

```pythongrades = [100, 100, 90, 40, 80, 100, 85, 70, 90, 65, 90, 85, 50.5]

def print_grades(grades):

for grade in grades:

print grade

def grades_sum(grades):

total = 0

for grade in grades:

total += grade

return total

def grades_average(grades):

sum_of_grades = grades_sum(grades)

durchschnitt = sum_of_grades / float(len(grades))

return durchschnitt

def grades_variance(scores):

variance = 0

average = grades_average(grades)

for score in scores:

variance += (average - score) ** 2

total_variance = variance/float(len(scores))

return total_variance

print grades_variance(grades)

`<do not remove the three backticks above>`