How do I calculate the total challenge rating of a group of monsters? I don't think adding all the individual challenge rating is right.
For 3 PCs of 2nd level; I am preparing a goblin war-band consisting of fifteen 1st level goblin warriors, three wolves, and one 3rd level goblin fighter. I want to challenge them appropriately.
(.33*15)+1+1+1+1=8.9 this doesn't seem like it should be a ninth level encounter to me. Please help.