The ratio of the incomes of A and B is 7 : 5. A and B save ₹4,000 and ₹3,500, respectively. If the expenditure of B is half the expenditure of A, then the total income of A and B (in ₹) will be:

12,000

Income of A : B = 7 : 5

According to the question,

⇒ \(\frac{7x - 4000}{5x - 3500}\) = \(\frac{2}{1}\)

⇒ 7x - 4000 = 10x - 7000

⇒ 3x = 3000

⇒ x = 1000

⇒ Total income of A and B = (7 + 5) x 1000 = 12 x 1000 = Rs. 12,000.