(a) Let the monthly income of B be Rs. x. Then, Monthly income of A= Rs. 2x and Saving of A=5000 x 4/(4 +1) = Rs. 4000 Saving of B = Rs. 1000 Now, we have (2x - 4000) / (x-1000) = 5/3 ⇒ 6x -12000 = 5 x - 5000 x = Rs.7000 So, Monthly income of B = 7000