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Difficult IR Question from Exam Pack 1

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Difficult IR Question from Exam Pack 1 [#permalink] New post 04 Nov 2013, 07:42
Please help!!
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Re: Difficult IR Question from Exam Pack 1 [#permalink] New post 04 Nov 2013, 08:04
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There seems to be a lot of useless information here to throw you off guard.

Let's say x books were sold between 1990-1995.

It says in the text "Total sales for the period from 1995-2000 represented an increase of 52 percent over total sales for the preceding five years."

So, 1.52*x books were sold between 1995-2000.

It then also says "For the period of 2000-2005, sales were double the sales for the previous five-year period."

This means, between 2000-2005, 2*(1.52*x) books were sold. (or 3.04*x)

Now look at the answer choices. We need to find x and 3.04x.
If we let x = 1320, then 3.04x should be around 4013, but there's no answer choice around 4013.
Next, let x = 1530. Then 3.04x should be around 4651. Aha! There's a choice for 4640, but let's just make sure there's nothing closer.
If we let x = 2530 (or more) then 3.04x = 7691 (or more), so we can eliminate the rest of the choices.

Thus your answer is 1530 and 4640.

Hope that helped.
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Re: Difficult IR Question from Exam Pack 1 [#permalink] New post 07 Nov 2013, 16:22
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ROHIT5073 wrote:
Please help!!


here is how i did it:
let X be sales between 1990-1995, so 1.52x represents sales between 1995-2000.

since by 2000, sales =3843, that means x+1.52x=3843, solve for x =1525

1.52*1525=2318, and double 2318 we get 4636
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Re: Difficult IR Question from Exam Pack 1 [#permalink] New post 08 Nov 2013, 05:05
mayer87 wrote:

here is how i did it:
let X be sales between 1990-1995, so 1.52x represents sales between 1995-2000.

since by 2000, sales =3843, that means x+1.52x=3843, solve for x =1525

1.52*1525=2318, and double 2318 we get 4636


Fascinating. Your way is more straightforward.
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Re: Difficult IR Question from Exam Pack 1   [#permalink] 08 Nov 2013, 05:05
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