Problem with system generation

[President_Elect_Shang]

How is the random generation of planets handled? Given this line:

Code:

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Chance Type 1 Any Comp 3 Type                    := Gas Giant

Chance Type 1 Any Comp 3 Chance                  := 25

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Does this mean (#1) a 25% percent chance out of a 100 that a gas giant will be created? Or (#2) does it mean a 25% chance out of the total of four (also set at 25%) chances I have that a gas giant will be created. I would think that if it was #2 the systems would be much more heavily populated with planets than they are.