45. Suppose that the check digit for the bank routing number was chosen to be the last digit of instead of using the method described in this chapter. How would this compare with the actual check digit?
45.
If is the check digit for the weights 7, 3, 9, 7, 3, 9, 7, 3 and is the check digit for the weights 3, 7, 1, 3, 7, 1, 3, 7, then when . Otherwise, .