I don’t know what seem to the issue with my code, here"s the instruction;

Define a function, grades_average, below the grades_sum function that does the following:

Has one argument, grades_input, a list

Calls grades_sum with grades_input

Computes the average of the grades by dividing that sum by float(len(grades_input)).

Returns the average.

Call the newly created grades_average function with the list of grades and print the result.

Here’s my code:

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

#total = 0

def grades_sum(scores):

total = 0

for grade in scores:

total += grade

return total

#print total

print grades_sum( grades )

def grades_average(grades_input):

sum_of_grades = grades_sum(grades)

average = sum_of_grades / float(len(grades))

return average

print grades_average(grades)

Here’s the error message am getting:

grades_average([3]) returned 80.42307692307692 instead of the expected: 3.0.

Am just not getting the strategy in this function definitions, is there any additional trick that I need to learn???