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In Patton City, days are categorized as having heavy rainfall (more than two inches), moderate rainfall (more than one inch, but no more than two inches), light rainfall (at least a trace, but no more than one inch), or no rainfall. In 1990, there were fewer days with light rainfall than in 1910 and fewer with moderate rainfall, yet total rainfall for the year was 20 percent higher in 1990 than in 1910.

If the statements above are true, then it is also possible that in Patton City

(A) the number of days with heavy rainfall was lower in 1990 than in 1910 (B) the number of days with some rainfall, but no more than two inches, was the same in 1990 as in 1910 (C) the number of days with some rainfall, but no more than two inches, was higher in 1990 than in 1910 (D) the total number of inches of rain that fell on days with moderate rainfall in 1990 was more than twice what it had been in 1910 (E) the average amount of rainfall per month was lower in 1990 than in 1910

we want the statement that agrees with question.

Initially went with D but thought the following explanations made a lot of sense!

Quote:

grepro wrote:

I think A is a possible answer as it says:

"the number of days with heavy rainfall was lower in 1990 than in 1910" however the amount of rain in 1990 can be more on these days than in 1910. Since heavy rainfall is defined as anything greater than 2 inches.

Quote:

quantum wrote:

In Patton City, days are categorized as having heavy rainfall (more than two inches), moderate rainfall (more than one inch, but no more than two inches), light rainfall (at least a trace, but no more than one inch), or no rainfall. In 1990, there were fewer days with light rainfall than in 1910 and fewer with moderate rainfall, yet total rainfall for the year was 20 percent higher in 1990 than in 1910.

If the statements above are true, then it is also possible that in Patton City

A. the number of days with heavy rainfall was lower in 1990 than in 1910 definitely possible. Consider in 1990 one day about 1000000000 inches fell. (just kidding, but u get the point)

B. the number of days with some rainfall, but no more than two inches, was the same in 1990 as in 1910 can't be true because we know moderate and light says were fewer in 1990 than in 1910

C. the number of days with some rainfall, but no more than two inches, was higher in 1990 than in 1910 same problem as in B

D. the total number of inches of rain that fell on days with moderate rainfall in 1990 was more than twice what it had been in 1910 not mathematically possible. We can only get twice the amount of rainfall if the number of moderate days were the same and all the moderate days in 1990 have 2 inches of rain and all the moderate rain days have 1 inch of rain in 1910

E. the average amount of rainfall per month was lower in 1990 than in 1910 not possible (unless there were more months in 1990 )since we are told total in 1990 was hight really tuff one

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My undertanding here is that if total rainfall in 1910 was x then in 1990 it was 1.2x with fewer days of moderate & light rainfall as compared to that in 1910. (howver total rainfall would utilmately depend upon the total inches of rainfall rather than days)

so this is possible only if a) the total haeavy rainfall in inches in 1990 was more than 1910

b) total moderate or light rf in inches in 1990 was more than 1910

now the Q asks If the statements above are true, then it is also possible that in Patton City

so D is the choice which logically supports the arguement, as it says that total amt of moderate rainfall was more in 1990 than 1910 which may account for the 20% inc

i see a lot of people chose D, but D can never be true.

1 < rain in moderate day < 2

even if the number of days with moderate rainfall were the same, something not true btw, the total rainfall can still not be more than twice. it is mathematically not possible i.e. 1.000001 vs. 1.9999999 [it's just not twice].

A is possible because the number of days with no rainfall could be substantially high in 1910. therefore, there is a possibility that days with heavy rainfall were lower in 1990. all other choices are not possible at all.
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Just went through the explanations..Change my answer to A..Phew!!!that's a tough one..D almost stares at you the first time you look at it..and A is just easily eliminated the first time..

Re: In Patton City, days are categorized as having heavy [#permalink]

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24 Dec 2011, 09:31

Yep. Very complicated to get to the right answer A. But after reading the explanations, it makes perfect sense. A has to be the correct answer. The number of days of heavy rainfall can be lower and the amount of rainfall on these days of heavy rainfall can be higher. This will account for the increased rainfall in 1990. Very nice question. +1 to the original post. Thanks.

Re: In Patton City, days are categorized as having heavy [#permalink]

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15 Mar 2012, 22:30

OK, I fell for the wrong answer too. I chose E. But when I reviewed this myself, I found the question to be a very straight forward MUST BE TRUE kind of question. If you go in with the MUST BE KIND type of mindset you can do this under 2 mins.

(A) the number of days with heavy rainfall was lower in 1990 than in 1910 CORRECT (B) the number of days with some rainfall, but no more than two inches, was the same in 1990 as in 1910 So, this includes Medium and Low types. So, There is no way 1990 can be same as 1910 based on given data. (C) the number of days with some rainfall, but no more than two inches, was higher in 1990 than in 1910 So, this includes Medium and Low types. So, There is no way 1990 can be higher than 1910 based on given data. (D) the total number of inches of rain that fell on days with moderate rainfall in 1990 was more than twice what it had been in 1910 So, this answer choice is slightly tricky. When answering this choice, I asked myself is can you conclude this answer choice based on the data from above? The answer was there isn't sufficient information to comment. So, reject this choice and move on. (E) the average amount of rainfall per month was lower in 1990 than in 1910 This was my original correct answer but quite obviously its the wrong answer. But Why?? The reason is we have no information about the number of inches of for each day. The total rainfall is # of days of rainfall multiplied by # of inches per day of rainfall then divided again by total # of days in the month . So, several informations are lacking. So, reject this answer and move on with A as correct answer.

Re: In Patton City, days are categorized as having heavy [#permalink]

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02 Jul 2012, 06:16

A clear 'A' for me. the question is only to check "if it is possible" that either of the options could work out.

Option A is a very much possible

Option D isnt possible for the reason moderate rainfall is defined as >1 and <2 inches and no number in between can satisfy the condition "more than twice as much but still less than or equal to 2".

(A) the number of days with heavy rainfall was lower in 1990 than in 1910 >>>> The author says lower light and moderate rainfall, YET only 20% more rainfall in 1990. This means there was some other factor that led to lower total rainfall. Above argument solves this !

(B) the number of days with some rainfall, but no more than two inches, was the same in 1990 as in 1910 >>> There is no such rainfall listed in the question. So rejected.

(C) the number of days with some rainfall, but no more than two inches, was higher in 1990 than in 1910 >>> There is no such rainfall listed.

(D) the total number of inches of rain that fell on days with moderate rainfall in 1990 was more than twice what it had been in 1910 >>> If 1910 received 1.5inch of rainfall, then 1990 would have received 3inch rainfall. But 2+ inch means heavy rainfall. So this is incorrect too.

(E) the average amount of rainfall per month was lower in 1990 than in 1910 >> This will mean that 1990 had less rainfall than 1910.

Not clear.. can you please explain for options B,C & D
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Re: In Patton City, days are categorized as having heavy [#permalink]

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12 Sep 2012, 02:39

Took me quite a while to figure the argument out. If only the question stem had included "yet ONLY 20%" more then it might have been a lot more easier. I chose D here. Goign through the above explanations I see my mistake but I am still not entirely convinced on A. A surely now seems to be the best amongst the answer choices though.

Tough question.
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Re: In Patton City, days are categorized as having heavy [#permalink]

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14 Sep 2012, 17:40

+1 A

It doens't matter the number of days of heavy rainfall in 1990. Probably, the number of inches in those days was so high to make the total rainfall 20% higher in 1990.
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Shoot, that feeling when you take 3 minutes to answer, and are absolutely convinced that your answer is right and the OA provided is wrong and then you read down the thread and you see more and more why you are wrong and the OA is right and are eventually convinced. i hate that feeling. ugh.

deepakraam wrote:

I chose option D bt still not convinced with the OA as A

Re: In Patton City, days are categorized as having heavy [#permalink]

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22 Jan 2013, 09:08

Really sneaky.

I eliminated D and E as soon as as I started the POE, then B because I did not think there were enough proof to support and then between A and C went with C.

Not that I realize that "some rainfall" is a category not stated by the argument I realize how much easier it would have been.
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Re: In Patton City, days are categorized as having heavy [#permalink]

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22 Jan 2013, 10:55

Superb question! I would love to know the source: If it isn't a GMAC official question, I congratulate and admire whoever wrote it.

There are two things that have to be noticed to get the right answer. First, this Inference question is NOT asking for the answer which MUST be true (the usual type of inference question). It is asking for the answer which is possible. So all four of the wrong answers must be FALSE (if the paragraph is true), and the right answer either is true, or COULD be. The second thing that you absolutely must notice is that the NUMBER of days of rainfall, or of any particular level of rainfall, is not the same thing as the AMOUNT of rainfall. Once you see which parts of the paragraph and which answer choices are providing numbers of days, and which are providing amounts, you can correctly see why B, C, D, and E are each impossible.

This is a brilliant question. I've worked in Marketing since 1985, and I can't count the number of times I have seen managers come up with completely wrong conclusions or decisions because they equated number of occasions with quantity.
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