It's also quite useful, especially when it comes to probability and calculations in the domain of combinatorics.

它还很有用，尤其是在组合学中的概率计算中。

We can use a field of mathematics known as combinatorics, which deals with the likelihoods of different combinations.

我们可以使用称为组合学的数学领域，它处理不同组合的可能性。