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From 1985 to 1994, what was the percent increase in total Un

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Phoenix72
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From 1985 to 1994, what was the percent increase in total Un [#permalink] New post  Updated on: 13 Sep 2013, 03:39
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From 1985 to 1994, what was the percent increase in total United States trade?

(1) Total United States trade in 1985 was 17 percent of gross domestic product in 1985.
(2) Total United States trade in 1994 was 23 percent of gross domestic product in 1994.
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Originally posted by Phoenix72 on 13 Sep 2013, 03:35.
Last edited by Bunuel on 13 Sep 2013, 03:39, edited 1 time in total.
Renamed the topic, edited the question and added the OA.
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Re: From 1985 to 1994, what was the percent increase in total Un [#permalink] New post  13 Sep 2013, 03:40
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Phoenix72 wrote:
From 1985 to 1994, what was the percent increase in total United States trade?

(1) Total United States trade in 1985 was 17 percent of gross domestic product in 1985.
(2) Total United States trade in 1994 was 23 percent of gross domestic product in 1994.


It's straight E. We don't know the change in gross domestic product from 1985 to 1994.

Answer: E.

Does this make sense?
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Phoenix72
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Re: From 1985 to 1994, what was the percent increase in total Un [#permalink] New post  13 Sep 2013, 23:04
Thanks Bunel got it now.Careless mistake at my end. I didn't consider the GDP change.
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From 1985 to 1994, what was the percent increase in total Un [#permalink] New post  09 Jun 2016, 22:20
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This is a 2-by-2 question that frequently appears in the GMAT Math.
There are 4 variables (a, b, c and d) in the original condition and the question. In order match the number of variables to the number of equations, we need 4 equations. Since the condition 1) and the condition 2) each has 1 equation, there is high chance that E is the correct answer. In fact, using both the condition 1) and the condition 2), the correct answer is E.
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Re: From 1985 to 1994, what was the percent increase in total Un [#permalink] New post  18 Jun 2021, 09:35
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Solution:

For figuring out the percentage change, we would need the trade values of 1985 and 1994.

St(1):- Total United States trade in 1985 was 17 percent of gross domestic product in 1985

No information provided or inferred on trade values (Insufficient)

St(2):-Total United States trade in 1994 was 23 percent of gross domestic product in 1994

No information provided or inferred on trade values (Insufficient)

On combining both,
We still have no information on trade values (option e)

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Re: From 1985 to 1994, what was the percent increase in total Un [#permalink] New post  28 Jun 2021, 05:10
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Phoenix72 wrote:
From 1985 to 1994, what was the percent increase in total United States trade?

(1) Total United States trade in 1985 was 17 percent of gross domestic product in 1985.
(2) Total United States trade in 1994 was 23 percent of gross domestic product in 1994.


Target question: From 1985 to 1994, what was the percent increase in total United States trade?

Since we don't know the gross domestic product in 1985 and 1994, there's no way to answer the target question with certainty.
Consider these two possible cases:

Case a: In 1985 the gross domestic product was $100, and in 1994 the gross domestic product was $100 also.
So, US trade in 1985 was $17, and US trade in 1994 was $23
This represents about an approximate 35% increase from 1985 to 1994.

Case b: In 1985 the gross domestic product was $100,000 and in 1994 the gross domestic product was $100 also.
So, US trade in 1985 was $17,000, and US trade in 1994 was $23
This represents an approximate 99.8% decrease from 1985 to 1994.

Answer: E
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Re: From 1985 to 1994, what was the percent increase in total Un [#permalink] New post  30 Nov 2022, 10:46
I did not understand it in one go and took some time to understand because I took it as 17 per of GDP and 23 percent of GDP and then the GDP crosses out in the percentage change formula. However, we do not know if GDP stays the same throughout or if it might have changed between 1985 and 1994. Hence it is E.
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Re: From 1985 to 1994, what was the percent increase in total Un [#permalink]
30 Nov 2022, 10:46
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