How index table keeps index records

I have a table with following columns:
division   group   email

Then, i create a non-unique index for:
division   group

I insert the following data:
division   group   email
1            A         a@[EMAIL PROTECTED]
            A         b@[EMAIL PROTECTED]
 this set of data in table, will the index table consist of 1
index record, i.e.
division   group
1            A
or will it contains 2 index records, i.e.
division   group
1            A
1            A

Thanks for prompt reply.