I01-10

Question

The table below summarizes information in several categories about the different flights at a major international airport.
      Year   Destination   Charter   Cargo   Commuter   Non-Revenue   Total       2005   Domestic   204   8,193   59,973   1,728   230,242       2005   International   1,266   14,380   5,209   1,324   119,706       2006   Domestic   217   7,419   64,971   1,180   250,413       2006   International   1,023   13,417   5,814   1,269   128,014       2007   Domestic   215   7,586   91,600   1,097   302,958       2007   International   1,823   13,311   6,231   1,198   140,796       2008   Domestic   50   6,820   83,428   1,605   288,025       2008   International   488   10,926   7,964   1,203   150,366       2009   Domestic   30   5,723   81,302   1,398   272,804       2009   International   171   7,839   7,503   525   142,482       2010   Domestic   39   5,942   68,726   1,184   252,445       2010   International   188   9,387   7,714   526   144,525

For each of the following statements, select  True  if the statement can be verified as true based on the information provided. Otherwise, select  False .

Bunuel · Answer

Official Solution:

Statement 1 
 
A direct correlation means that as one variable increases, the other also increases, or as one decreases, the other decreases—they move in the same direction. Between 2005 and 2010, the number of domestic non-revenue flights followed the pattern: down, down, up, down, down. During the same period, the total number of domestic flights followed a different pattern: up, up, down, down, down. Clearly, there is no direct correlation between these numbers. Therefore, this statement is False.
 
 Statement 2 
 
The greatest decrease occurred in International Charter flights, which dropped from 1,266 to 188—a decrease of approximately 85%. The greatest increase occurred in International Commuter flights, which rose from 5,209 to 7,714—an increase of approximately 50%. Therefore, this statement is True.
 
 Statement 3 
 
In 2005, the number of international cargo flights was 14,380, while the combined total of all international and domestic flights was 119,706 + 230,242 ≈ 350,000. Clearly, 14,380 is less than 10% of 350,000. Therefore, this statement is False.

Correct answer:

From 2005 to 2010, there was a direct correlation between the number of domestic non-revenue flights and the total number of domestic flights.  "False"

The largest percentage decrease in flights for any category from 2005 to 2010 is greater than the largest percentage increase in flights for any category from 2005 to 2010.  "True"

In 2005, international cargo flights represented more than 10% of the total number of international and domestic flights combined.  "False"

Bunuel · Answer

I have revised the question, solution, and formatting by adding more details to enhance clarity

ManifestMBAbay25 · Answer

for statement 2 can you suggest a quick way to solve this or identify the change.

ManifestMBAbay25 · Answer

Bunuel 
for statement 2 can you suggest a quick way to solve this or identify the change.

Bunuel · Answer

You should basically compare red with red and blue with blue in the image below. A quick scanning should help you spot where the greatest decrease and the greatest increase happen. Not much actual calculation is needed, just a methodical step-by-step approach and good number sense.

Show Spoiler

Attachment:

GMAT-Club-Forum-st6kzqel.png

kanwar08 · Answer

Bunuel

I have a small doubt on the question stem:

Take 3rd question, which asks whether international cargo flights represented more than 10% of the total number of international and domestic flights combined

Since, based on the given info, I can find whether it does or not. So, shouldn't it be True?

Can you help me distinguish how to approach such prompts?

Bunuel · Answer

The confusion is with the wording "can be verified as true." It does not mean "can be checked." It means the statement must actually turn out to be true when checked. If it's false after checking, you must mark False. So even if the data lets you verify it, if the claim itself is not true, the answer is still False.

Bunuel · Answer

I have revised the question, solution, and formatting by adding more details to enhance clarity

iurequi · Answer

in this, you've compared only 2005-10, but in the question stem, it asked 2005-2010, so I want to understand that did we considered the rest of the years? like did we compared 06,07,08,09? If not then why? and how can we interpret it from the question that its only asking for 2005-10 % change?

Bunuel · Answer

The question asks for the largest percentage change  from 2005 to 2010 , meaning we look at how much each category changed between those two specific years. We don’t need to include 2006–2009 because the question is about the  overall change over the period , not the  trend within it . So, here, “from 2005 to 2010” sets 2005 as the starting point and 2010 as the ending point for one direct comparison.

qwertyuiop28 · Answer

I did not quite understand the solution. In the second statement, we arent given specifics as to how to calculate the percent decrease or increase. Like is it for consecutive years only or between any two years

Bunuel · Answer

Check  this post . Hope it helps.

I01-10

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My Rewards

Year	Destination	Charter	Cargo	Commuter	Non-Revenue	Total
2005	Domestic	204	8,193	59,973	1,728	230,242
2005	International	1,266	14,380	5,209	1,324	119,706
2006	Domestic	217	7,419	64,971	1,180	250,413
2006	International	1,023	13,417	5,814	1,269	128,014
2007	Domestic	215	7,586	91,600	1,097	302,958
2007	International	1,823	13,311	6,231	1,198	140,796
2008	Domestic	50	6,820	83,428	1,605	288,025
2008	International	488	10,926	7,964	1,203	150,366
2009	Domestic	30	5,723	81,302	1,398	272,804
2009	International	171	7,839	7,503	525	142,482
2010	Domestic	39	5,942	68,726	1,184	252,445
2010	International	188	9,387	7,714	526	144,525

True	False
		From 2005 to 2010, there was a direct correlation between the number of domestic non-revenue flights and the total number of domestic flights.
		The largest percentage decrease in flights for any category from 2005 to 2010 is greater than the largest percentage increase in flights for any category from 2005 to 2010.
		In 2005, international cargo flights represented more than 10% of the total number of international and domestic flights combined.