A sum of money is to be divided equally among P, Q and R

A sum of money is to be divided equally among P, Q and R in the respective ratio of 5 : 6 : 7 and another sum of money is to be divided between S and T equally. If S got ₹ 2100 less than P, then how much amount did Q receive?

Couldn't be determined, since the total amount of money is not given in either of the case