https://phys.org/news/2018-07-dice-expert-games.html

It should be noted that using these methods in a casino are illegal and I'm not suggesting you adopt them in such establishments – but it's an interesting look at how probabilities work.

For a fair die, each number has an equal one in six, or 16.67%, chance of appearing. In the case of the die found in Norway, the numbers four and five are twice as likely to appear (as there are two of them), so have a one in three, or 33.33%, chance. The table shows these probabilities.