general doubt

if a coaching institute's tution fee is rs.1lac and service tax is charged 10,300rs. accordingly....

if at the time of joining the institute, a student gets 50% scholarship, then what will be amount of service tax in following cases?

CASE1-IF HE HAS NOT YET PAID THE FEES

CASE2-IF HE HAS GIVEN AN ADVANCE OF 30,000 rs.  AND SUBSEQUENTLY BEEN GRANTED SCHOLARSHIP

CASE3- IF HE HAS PAID THE ENTIRE FEE OF rs.1,00,000