The monthly incomes of A and B are ₹12000 and ₹15000 respectively. The monthly expenditure of A is ₹8000. If the ratio of the monthly expenditures of A and B is 2 : 3, then what is the sum of their monthly savings?

₹7000

                   A           B

Income =  12000    15000

Exp.    =   8000

⇒ Expenditure ration of A : B = 2 : 3

⇒ 2 units = 8000

⇒ 1 unit = 4000

⇒ 3 units = 3 x 4000 = 12000.

⇒ So, expenditure of B = Rs. 12000 

⇒ Saving of A = 12000 - 8000 = 4000,

⇒ Savings of B = 15000 - 12000 = 3000,

⇒ Sum of savings of A and B = 4000 + 3000 = Rs. 7000.