Concept:Use the relation: Savings = Income − Expenditure, then solve the two linear equations.Explanation:Let Chen’s and Kia’s incomes be 7x and 5x.Let Chen’s and Kia’s expenditures be 3y and 2y.Since each saves ₹1,000:7x−3y=1000 ...(i)5x−2y=1000 ...(ii)Multiply (i) by 2 and (ii) by 3:14x−6y=200015x−6y=3000Subtracting, we get x=1000.Substitute x=1000 in (i):7(1000)−3y=10007000−3y=10003y=6000⇒y=2000Chen’s expenditure =3y=3×2000=₹6000.Answer:Option A — ₹6,000.