grades = [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)

average = sum_of_grades / float(len(grades))

return average

def grades_variance(scores):

average = grades_average(grades)

variance = 0

for score in scores:

variance += (average - score)**2

return variance/len(scores)

print grades_variance(grades)

It says Oops, try again. grades_variance([2, 5]) returned 5919.4097633136 instead of the expected: 2.25

Don't know where code went wrong

`Replace this line with your code.`