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# Monthly expenses - Cliffs - PS

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Director
Joined: 09 Aug 2006
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Monthly expenses - Cliffs - PS [#permalink]

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06 Nov 2006, 07:50
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Can anyone please help Why option C is wrong ?
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Senior Manager
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Location: Phoenix, AZ, USA
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06 Nov 2006, 09:42
Answer E

Lets look at (II) 1st

Its says total expenses have 4 component it helps but doesnot help to resolve total %

1 tells us proportion of individual expenses on 1st glance u might think the two give solution

But u donot know individual values

1/2 of electricy we need to know how much is total ?

1/2 of 100 is 50 and 1/2 of 1000 could be 500

SO unless u know values u wil come with diff % of wehat they have paid

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Manager
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06 Nov 2006, 18:50
Yes C is wrong because you don't know the totals of any of the utilities

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Director
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08 Nov 2006, 07:02
Yeah... Even I thought it that way.. But here the answer is asked in % .. So Let the total be X.

We have 50% of x + 50 % of + ... and so on which adds up to 100%..

what is the flaw in my logic here ..?

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Senior Manager
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08 Nov 2006, 07:34
Amit05 wrote:
Yeah... Even I thought it that way.. But here the answer is asked in % .. So Let the total be X.

We have 50% of x + 50 % of + ... and so on which adds up to 100%..

what is the flaw in my logic here ..?

Since the question says 50% of x, 25% of y, and 75% of z, the values depend on x,y, and z. If we assume different set of values, we could not get the same percentage. But, if everything is paid 50%. then the total %paid could be 50% too. Am I right?

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08 Nov 2006, 15:15
Yes I agree.

I get E.

Without knowing the relative values of the gas, electricity etc you cannot calculate a %

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08 Nov 2006, 15:24
Why would anyone pay 1/4 of their water bill but 3/4 of their trash bill? "Can't shower, brush our teeth, or flush the toilet since they turned the water off, but at least we don't have any of that crap we don't need anymore lying around". The question is obviously messed up.

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08 Nov 2006, 15:24
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# Monthly expenses - Cliffs - PS

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