def get_average(*args):
    return sum(args) / len(args)

print(get_average(5, 10, 15))
print(get_average(5, 10, 15, 20, 40))
print(get_average(1, 2, 3, 4, 0, 19, 20, 49, 17, 30, 1, 3, 2, 6, 7, 88))