Train The Trainers

numberOfPeople = int(input())
nameOfPresentation = input()
allScore = 0
counter = 0
while nameOfPresentation != "Finish":
    sumOfGrades = 0
    for i in range(0,numberOfPeople):
        grade = float(input())
        sumOfGrades += grade
    grade_for_presentation = sumOfGrades / numberOfPeople
    print(f"{nameOfPresentation} - {grade_for_presentation:.2f}.")
    counter += 1
    allScore +=grade_for_presentation
    avarage_score = allScore / counter
    nameOfPresentation = input()

print(f"Student's final assessment is {avarage_score:.2f}.")