The answer is 888+88+8+8+8
What is ZI? Can you specify? thanks
(1) Repetition allowed : There are 4 choices for both positions, so 4 × 4 = 16 2-digit numbers can be formed. (2) Repetition not allowed : There are 4 options for tens position, and three options for ones position. Therefore, 4 × 3 = 12 2-digit numbers can be formed.
Answer:
30 fine years ya know I was in England robing a back sooo