Rs. 2430 has been divided among A , B, C in such a way

Rs. 2430 has been divided among A , B, C in such a way their if their shares be diminished by Rs. 5, Rs.10 and Rs. 15 respectively. The remainders are in the ratio 3 : 4 : 5. Then A's share is ?

∵ Remainder = Rs. [ 2430 - (5 + 10 + 15)] = Rs. 2400
&there4 A's share = Rs. [ (2400 x 3/12) + 5 ] = Rs. 605