Apedlock has a four digit code that includes digits from 0 to 9, inclusive.
what is the probability that the code does not consist of all odd digits of the same digit is not used more than once in the code ? ?

There are ways of making four-digit codes from the five available odd numerals (1, 3, 5, 7, 9) without replacement. Without any restrictions aside from no replacement, there are possible codes that can be made. So the probability of randomly choosing a code made up only odd digits is



which means the probability of this not occurring is