Question

the income of a,b and c are in the ratio 7:9:12 and the ratio of their expenditures are 8:9:15 . if a saves 1/4th of his income then the savings of a,b and c are in the ratio?​

Answer 1

saving of Answer: 56:99:69

Step-by-step explanation: Let the incomes of A,B and C be 7x, 9x and 12x respectively.

Let the expenditures of A,B and C be 8y, 9y and 15y respectively.

∴ Savinge of A,B and C are 7x-8y,9x-9y and 12x-15y respectively.

given, 7x-8y = 1/4×7x => 7x-7x/4=8y => 21x/4=8y => y=21/32x

∴saving of A,B,C are 7x/4 :9x-9×21x/32:12x-15×21x/32 i.e., 7x/4: (288x-189x)/32: (384x−315x)/32 => 56

​/32:99x/32:69x/32 => 56:99:69