Question

The income of A:B are in the ratio 7:9 and there saving are in the ratio 5:7 . What is the ratio of their expenaiture ? Hint ;- If B saves 2/3 of his income​

Answer 1

Answer:

let the ratio of income be 7x and 9x

and the ratio of savings be 5y and 7y.

if B saves 2/3 of his income then

7y = 2/3*9x

y = 6x/7

the ratio of expenditure = (7x - 30x/7)/(9x - 6x)

19x/7*1/3= 19/21 = 19:21