Question

When looking at probability, the___ is the whole of what we are talking about

Answer 1

Some options that can fill this empty space in order to make the phrase make sense is:

when looking at probability, the 100% is the whole of what we are talking about​.

when looking at probability, the universe set is the whole of what we are talking about​.

Since we don't have options to choose, I believe the answer "100%" is the best option.