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Income, expenditure and savings: link between them gives a ratio of savings or expenditures

This type of question, asked 2 times: 15 Nov 2020 Tier II, 29 Jan 2022 Tier II. All 2 questions below, oldest first.

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  1. Question 1

    15 Nov 2020 Tier II

    66
    The monthly incomes of A and B are in the ratio 3:53 : 5 and the ratio of their savings is 2:32 : 3. If the income of B is equal to three times the savings of A, then what is the ratio of the expenditures of A and B?

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  2. Question 2

    29 Jan 2022 Tier II

    19
    The income of A is 23\frac{2}{3} of B's income and the expenditure of A is 34\frac{3}{4} of B's expenditure. If 13\frac{1}{3} of the income of B is equal to the expenditure of A, then the ratio of the savings of A to those of B is:

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