Probability is the well-founded science of calculating how likely an event is to happen. It has a strong theoretical basis grounded in mathematics and can produce results that very accurately reflect the statistical properties and distributions of events in real life.

(Caveat: A roleplaying game is not real life. Toss everything you think you know out the window.)

Transcript

Han: Chewie! Stop flying so casual! Take evasive action!
Chewbacca: My dear fellow, it may appear as though we are attempting to absorb every shot they are unleashing, but rest assured we are indeed evading many hundreds more.
Leia: Trimming thrust 25%! Chewie, shut up and concentrate! Look, flyboy, just trust us!
[SFX]: roll roll roll roll roll roll roll roll roll roll roll roll roll roll roll roll {scattered around a TIE fighter}
Luke: <roll>
[SFX]: KABOOOM!
Han: Great shot, kid! That was one in a million!
[SFX]: < squee diki pating ep whree ep >
R2-D2: You mean two in two.