Answer: #(13)
8,191
8,191The number of combinations that are possible with a 13-digit number is 8,191
Answer:# (2)
The number of permutations of n objects taken r at a time is determined by the following formula: P(n,r)=n! (n−r)! A code have 4 digits in a specific order, the digits are between 0-9.
Step-by-step explanation:
@Teacher Joseph
