I have a 12 digit keysafe and would like to know what is the best length to set to open 4,5,6 or 7?


If you mean setting 4,5,6 or 7 digits for the code, 7 digits would of course have the greatest number of permutations.

Updated on March 8, 2018

Original Article:

How to Work Out Odds, Permutations and Combinations and Calculate the Probability of an Event
By Eugene Brennan