help to Catalytic Reforming

[alejo12]

Hi everbody* Well I'm a student of Oil and Gas Engineering* so now* I'm studing a topic of Catalytic reforming.
I have a trouble to solve a exercise about catalytic reforming
This is my exercise

Heavy naphtha of 1000 kg/h having a specific gravity of 0.75 is used as
a feed to a reformer. This feed has a boiling range of (190–380F).
Make a material balance around the reformer knowing that the reformate
RON is 96.

My question is* How did I determine the initial composition of heavy naphtha using the average of boiling point?
Plz* thanks

[cuaurol]

Dear Alejo12.
Check this info.