2011-08-24, 02:34 PM
I don't think there's a special name or anything. They're just two different cases.
1) 10% bonus is a modifier to a single event.
2) Result of two independent events, i.e. the chances of at least one passing, 10% and 90%.
1) 10% bonus is a modifier to a single event.
2) Result of two independent events, i.e. the chances of at least one passing, 10% and 90%.

