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In western Europe, x bicycles were sold in each of the years 1990 and

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Joined: 24 Jul 2019
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In western Europe, x bicycles were sold in each of the years 1990 and  [#permalink]

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New post 07 Oct 2019, 21:40
EMPOWERgmatRichC wrote:
Hi All,

While this question is wordy, it can be solved by taking the proper notes and TESTing VALUES.

We're told that X bicycles were sold in each of the years 1990 and 1993.

IF.... X = 100

100 bicycles sold in 1990
100 bicycles sold in 1993

Next, we're told that the producers had a 42% share of the market in 1990 and a 33% share of the market in 1993....

1990 share = 42% of 100 = 42 bicycles
1993 share = 33% of 100 = 33 bicycles

We're asked for the DECREASE in the NUMBER of bicycles sold by those producers from 1990 to 1993. That number is 42 - 33 = 9, so we're looking for an answer that equals 9 when we place X = 100 into the answer choices. There's only one answer that matches...

Final Answer:

GMAT assassins aren't born, they're made,
Rich


I came up with the same approach when I saw this question for the first time, however, I still doubted my answer.
What I don't get is why it only works when plugging in 100.

Because if we say the market consists of 1000 bicycles then we would have a much larger %-decrease.
420 -> 330 (90 decrease in absolute number)

90/420 ~ 1/5

Can someone point out why my reasoning is flawed?

Much appreciation!
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Re: In western Europe, x bicycles were sold in each of the years 1990 and  [#permalink]

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New post 08 Oct 2019, 11:43
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Hi chrtpmdr,

You will still get the correct answer if you change the value of X... as long as you are answering the question that is ASKED.

IF... X = 1000, then the respective share of bicycles sold will become 420 and 330. The DECREASE then becomes 420 - 300 = 90... so we're looking for an answer that equals 90 when you plug X=1000 into it. That's still Answer

As an aside, 9/42 is the same as 90/420, but that was NOT what the question asked us for.

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Rich
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Re: In western Europe, x bicycles were sold in each of the years 1990 and   [#permalink] 08 Oct 2019, 11:43

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