Question

Incomes of A, B and C are in the ratio 7:9:12 and their respective expenditures are in the ratio 8:9:5.If A saves `1/4` of his income then the ratio of their saving sis `56 : 99 : 69` b. `15 : 28 : 27` c. `33 : 19 : 23` d. `56 : 69 : 99`

Answer 1

Savings=income-expenditure
Let the incomes of A,B and C be 7x,9x and 12x.
their respective expenditures be 8z,9z and 5z.
A saves `(1/4)^th` of his income=>`x/4=7x-8z`
=>`z=(21x)/32`
=>ratio of savings=>`x/4:9(x-z):(69x)/32`
=>`56:99:69`