Let amount of B = x then amount of A = 5x/6 and ratio of B/C=3/4 so, x/C = 3/4 therefore amount of C = 4x/3 A/Q, A+B+C = 760
or 5x/6 + x +4x/3 = 760
or 19x/6 = 760
or x = 760*6/19 = 240
therefore amounts of A = 5*240/6 = 200 rupees B = 240 rupees C = 320 rupees