Answer:
B. 6 units
Step-by-step explanation:
I am joyous to assist you anytime.
Answer:
I think its 336. I might be wrong though, But I hope I am right.
Step-by-step explanation:
Answer:
680
Step-by-step explanation:
Use the binomial coefficient where you choose numbers out of possible numbers and find the total amount of combinations since order does not matter:
Thus, you can make 680 three-non-repeating-number codes