Solution Exercise 36: python algorithm which calculates the average of the scores with coefficients

Exercise 36

Write a Python algorithm as a function which takes as parameter a couple (listScores, listCoefficients) and which returns the average obtained, where listScores designates the list of scores obtained by a students and listCoefficients designates the list of associated coefficients

Solution

def average (listScores, listCoefficients):
    # initialization of the mean
    average = 0
    # sum of the coefficients initialized
    sumCoefficients = 0
    
    for i in range (0, len(listScores)):
        # calculate the sum of the sum(coefficients*scores)
        average = average + listScores [i] * listCoefficients [i]
        # calculate the sum of the coefficients
        sumCoefficients = sumCoefficients + listCoefficients [i]
    average = average/sumCoefficients
    return average

# Example
listScores = [16, 14, 12]
listCoefficients = [2, 1, 4]
print ("The average is:", average (listScores, listCoefficients))
# The output is: The average is: 13.428571428571429