How to judge such chances?

Question

PHP

introductory: 2 opponents, the trophy to hack the vault worked for one, the trophy to protect the vault from hacking worked for the second, both trophies were pumped the same way, for example, by 20% and worked for both according to the condition (approximately) in order to judge them, then the numbers dropped in mt_rand() are compared, whoever has more wins the question: how to judge opponents if the numbers dropped in mt_rand() are equal? is it possible to substantiate this mathematically somehow, because you need to do something so that one of the opponents wins :)
if (mt_rand(1, 100) <= 20) // ok

Answer 1

Well, if they are both equal in odds, do rand(0,1) between them. I don't see any difficulty in this.

Answer 2

Well, as in stone paper scissors - we try until the results are different.

Answer 3

If the numbers are equal, refer to the comparison on another property.
For example, on the character's luck percentage

Answer 4

question: how to judge opponents if the numbers dropped in mt_rand() are equal?

Repeat just rand