RRB Group D Model Paper 9 with solutions

(1) Let monthly incomes of A, B and C be x, y and z, respectively. So,
x + y = 2 × 15050 = ₹ 30100
y + z = 2 × 15350 = ₹ 30700
z + x = 2 × 15200 = ₹ 30400
Adding all three we get, x + y + z = ₹ 45600
So, (x + y + z) – (y + z) = 45600 – 30700, x = ₹ 14900