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Common GMAT question - Can we generalize?

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by ssy » Thu Nov 01, 2007 1:32 am
I have seen a few variations of this question throughout my GMAT preparation and the answer always seems to be E.

Can we generalize that if, if revenue = (units sold)(cost), and if we do not know the exact number of units sold or original cost in the first place, we can never calculate the percentage change in revenue?
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Source: — Data Sufficiency |
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by camitava » Thu Nov 01, 2007 5:40 am
SSY, how can u calculate that?
Suppose, no of sofas in last yr = x
So this year = 11x/10
And by statement - II, if precious cost was p now it is (p + 5). So how do u calculate the diff man as u dnt know the value of x and p?

Are u getting me, SSY?
Correct me If I am wrong


Regards,

Amitava
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