Ok so I have a question concerning XP in adventure paths. Sometimes you may see something like "If the players manage to save all the NPC's award them 2400 bonus xp" Now the question is this 2400 per player OR is it 2400 divided by the number of players?
Divided. Note that the amounts almost always correspond to a CR rating and often correspond to the expected APL of the party at that point in the AP. (The standard story award from the CRB is equivalent to defeating a challenge with CR equal to the party's APL.)