Question 130
The incomes of A, Band C are in the ratio 7 : 9 : 12 and their spendings are in the ratio 8 : 9 : 15. If A saves 1/4 th of his income, then the savings of A, B and C are in the ratio of
Solution
let the income of A , B , C be 7a, 9a, 12a
and expenditure be 8b, 9b, 15b respectively
saving of A = 7a - 8b
savings of B = 9a - 9b
saving of C = 12a - 15b
given that 7a - 8b = 7/4 a
28a - 32b = 7a
21a = 32b
b = 21/32a
ratio of saving of A , B , C is :-
7/4a : 99a/32 : 69/32a
56 : 99 : 69
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