This is a really simple one but I just want to be 100% clear I'm doing this right:
Just starting out with D&D as a DM (using the Starter Set rulebook and the 5E Player's Basic Rules on the official site).
Let's say my group meets a Goblin. It has -1 WIS, so its passive perception score is 9 (-1 + 10). I get this.
If they meet an Adult Black Dragon, it has +1 WIS, but also +11 Perception as a skill. Does this mean its passive perception score is 21 (eg. +11 + 10)? Or is it just 11 (+1 + 10)?
Sorry this is basic – just want to make sure I understand it.