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The savings from a person’s income is the difference betwee

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The savings from a person’s income is the difference betwee [#permalink] New post   13 Apr 2019, 06:25
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The savings from a person’s income is the difference between his income and his expenditure.
The ratio of the incomes of Marc and his boss are in the ratio 3 : 4.
Their respective expenditures ratio is 1 : 2.

Quantity A
Quantity B
The savings from income of Marc
The savings from income of Marc’s Boss


A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
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san9090
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Re: The savings from a person’s income is the difference betwee [#permalink] New post   23 Sep 2019, 23:02
Solution please?
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Re: The savings from a person’s income is the difference betwee [#permalink] New post   24 Sep 2019, 00:40
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here we do have only the ratio.

The numbers could be infinite.

Even if you pick numbers the answer could be C or B.

These are questions which is best solve conceptually rather than trial and errors.

Always when you do have TWO ratios BUT not fix values you do not know.

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The savings from a persons income is the difference betwee [#permalink] New post   16 Aug 2022, 18:26
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Picking numbers is not a bad strategy, as long as we use the strategy to notice how we have no information.
Let's use the given ratios of income (3:4) and expenditure (1:2) - Mark to Boss.

---------- Mark ----- Boss
Income --- 30 ------ 40
_____________________
Expenditure 20 ------ 40
Savings --- 10 -- > --- 0
_____________________
Expenditure 5 ------ 10
Savings --- 25 -- < --- 30
_____________________
Expenditure 10 ------ 20
Savings --- 20 -- = --- 20

As we can see, we really have no way to say what is going on in terms of savings...

Answer is D.
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The savings from a persons income is the difference betwee [#permalink]
16 Aug 2022, 18:26
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