import random

numbers = [ ]
sum_number = 0

for number in range(1, 21):

    numbers.append(random.randrange(500, 1000,100))

    sum_number = sum_number + 1

print("Sum of numbers: ", sum(numbers))
print("Average of numbers: ", sum(numbers)/len(numbers))
print("Miniumum Number: ", min(numbers))
print("Maximum Number: ", max(numbers))