P=12Q; Q=2R or PQ=12; QR=21
Shares of P, Q, R = x, 2x,x QP+Q=2x3x=2:3
A sum of money is divided among P, Q and R so that each 5 rupee P gets, Q gets 3 rupees 25 paise and R gets 2 rupees. If R's share is Rs.80, then sum must be -