The Odds

Everyone knows C-3PO computed the possibility of successfully navigating a specific said asteroid field was approximately 3,720 to 1. The key word here is approximately.

To take off some of the heat from his sketchy calculations, he translated to Leia from R2-D2 that the chances of surviving a night outdoors on Hoth were 725 to 1. It’s much easier to fact check that one so this is why he probably attributed it to his companion.

Lastly, he informs Poe Dameron the probability of finding an alternate escape from the old Rebel base on Crait was 15,428-to-1. Pretty astronomical and likely impossible to verify without the help of a Mentat and plenty of spice.  

Not to lay everything on the nervous gold droid, it’s also noted that K-2SO states that there is a 97.6 percent chance of mission failure for Jyn and Cassian.

It’s pretty clear that droids in general don’t have much faith in biological races. 

There is an approximately 2376 to 1 probability that the approximate dimensions of this piece are approximately 4x10 inches.  Roughly.