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# In Patton City, days are categorized as having heavy

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

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14 Jun 2008, 11:55
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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

really tuff one
[Reveal] Spoiler: OA
If you have any questions
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14 Jun 2008, 22:26
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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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14 Jun 2008, 18:34
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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.
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23 Jun 2010, 06:45
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First I chose D, then after reviewing I see how A is the correct answer.

From the first statement we know

1990 has
fewer light rainfall days
fewer moderate rainfall days
20% more total rainfall

I think the question's design is for you to search for an explanation for the difference. We all know the questions:

"Which one of the following would best explain the seeming contradiction" or some wording similar......So this is the way we approach this question, that leads us to find D as a possible explanation.

But they questions is which could possibly be true.

You could read choice A as follows:

It is possible that in Patton City the number of days with heavy rainfall was lower in 1990 than in 1910.

Yes it is possible, why not. For example....

In 1990 we could have 10 days with heavy rainfall, and in 1910 we could have 11 days with heavy rainfall.

This example reminds us that when we see which could be true.....we should keep a very open mind.

I tried out some sample data for D.
1910 --> 100 moderate days x 1.0000000000000000000000000000000001 inches each day = c. 100 inches on moderate days
1990 --> 99 moderate days x 2 inches each day = 198 inches

198 inches is not greater than double 100 inches
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23 Jun 2010, 04:48
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I will go with A.

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

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14 Sep 2012, 16:18
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Fun question

Here is why (A) the number of days with heavy rainfall was lower in 1990 than in 1910 is the answer:

On first glance this answer seems the opposite of what we are going for. Surely, Patton City had more days with heavy rain in 1990 than in 1910, otherwise how could one possibly account for the 20% increase in rain from 1910 to 1990. But here is the thing: even if Patton City had fewer days with 2+ inches of rain in 1990 than in 1910, if those days were marked by heavily deluges, then 1990 would have more inches of rain than 1910. Let me illustrate: Let's say that in 1990 Patton City had five days with 2+ inches of rain (Day 1: 4 inches, Day 2: 5 inches, Day 3: 6 inches, Day 4: 5 inches, Day 5: 3 inches). In 1910 Patton City had six rainy days with 2+ inches or rain (Day 1 : 2.5 inches, Day 2: 2.3 inches, Day 3, 2.4 inches...etc.). You can see that, despite fewer 2+ inches days, 1990 has far more inches of rainfall from 2+ inches days than 1910 does.
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14 Jun 2008, 17:44
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i don't see any option as logically correct over here.
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14 Jun 2008, 12:18
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C by POE

A. the number of days with heavy rainfall was lower in 1990 than in 1910 -> cannot say..

B. the number of days with some rainfall, but no more than two inches, was the same
in 1990 as in 1910 -> cannot say...

C. the number of days with some rainfall, but no more than two inches, was higher in
1990 than in 1910 -> sounds good

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 -> may or may not be

E. the average amount of rainfall per month was lower in 1990 than in 1910 -> cannot be
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14 Jun 2008, 18:06
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I think D explains why total rainfall in 1990 was higher than that in 1910. So D is the correct ans.
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23 Jun 2010, 04:54
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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 [color=#8000FF]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[/color]

Nowhere in the question it is mentioned that no of moderate days were the same.??? Please correct me if I am wrong
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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23 Jun 2010, 20:18
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Thats how I figured out A -

Firstly, why it can not be C,D

C - the number of days with some rainfall, but no more than two inches, was higher in 1990 than in 1910. This contradicts with the stem that in 1990 we have had fewer days of moderate and light rainfall. So ruled out..

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. Lets assume in 1910 we have had three days of moderate rainfall and in 1990 the best scenario we could have two. Assume, worst case scenario we received 1 Unit of rainfall in all days in 1900 thus total 3 units and in 1990 we received 2 units (the max we could recieve for moderate) each day. Thus, it comes to total of 4 Units. But , 4<3*2. This contradicts the statement and this is the most favourable case that we could assume for 1990.

Why its A:
A) the number of days with heavy rainfall was lower in 1990 than in 1910
The number can be lower (assume just a difference of one day) , but the intensityof rainfall received 1990 could be substantially greater than in 1990 to offset this difference.

Hope it helps..

Thanks,
Aakash
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14 Jun 2008, 19:58
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D for me.

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.
doesn't help
B. the number of days with some rainfall, but no more than two inches, was the same
in 1990 as in 1910
Argument only mentions 4 categories of rainfall;some rainfall is not defined. some rainfall can be no rainfall too.
C. the number of days with some rainfall, but no more than two inches, was higher in
1990 than in 1910
Argument only mentions 4 categories of rainfall;some rainfall is not defined. some rainfall can be no rainfall too.
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
This says inches of rainfall was higher; helps
E. the average amount of rainfall per month was lower in 1990 than in 1910
doesn't help

really tuff one
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23 Jun 2010, 06:33
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D is not possible because it contradicts the prompt.

The prompt says "moderate rainfall (more than one inch, but no more than two inches)".

D says that the total number of incheas with moderate rainfall was more than twice what it had been. Since moderate rainfall, as defined in the prompt, is more than one but less than two, it isn't possible for this answer to work.

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

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02 Jul 2013, 08:38
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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

I actually think this is a great question. It highlights the logic that the GMAT is looking for, and of course the trickery they're known for. They also often put verbal understanding in quant questions and math understanding in verbal questions. This is such a question. If the total rainfall was higher in 1990 than 1910, you figure there were more rainiy days in 1990, but that doesn't have to be true. All the rain could have fallen on one day (at the logical extreme) and then had 364 days of clear skies. If you understand that this is possible, then you realize that A is possible. There were 5 days of 10+ inch torrential rain in 1990, and 15 days of 2 inch downpour in 1910. More days in 1910, but more rain in 1990.

The other answer choices can be eliminated by the question stem (B, C and E) or by basic math (D). Days with moderate rainfall are between 1 and 2 inches, so at a minimum value 1.00. If they double, they will no longer count as moderate rainfall days and instead move up to heavy. The biggest difference you can have was 1.00 in 1910 and 1.99 in 1990. This will never get to double the rainfall. A is the only possibility, although it is counter-intuitive. This type of reasoning is helpful in math as well, particularly in stats when you realize that average is the most misleading characteristic of them all.

Hope this helps!
-Ron
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Re: In Patton City, days are categorized as having heavy [#permalink]

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06 Jul 2013, 00:55
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NO option is logically correct... but, i will go with D
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Re: In Patton City, days are categorized as having heavy [#permalink]

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18 Jun 2014, 19:17
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Shalabh18 wrote:
If the number of days of light, moderate & heavy rainfall are all lower in 1990, then how could the total rainfall be more?

Still not convinced with A

If in the first week it rains for one day and in the second week it rains for two days, can you conclude that it rained more in the second week? What if the one day of the first week was a full day of heavy downpour and the two days of the second week just saw light 5 minute showers each? Number of days is just one aspect. The amount of rainfall that fell on each day is another.
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14 Jun 2008, 12:34
how is 'c' possible

The stem says there are fewer days of light and moderate rain in 1990
option C directly contradicts what is written in the stem cos it essentially says that 1990 got more number of light and moderate rain days , which is false

IMO the best choice is D ....

lets say 1990 got fewer no of days for moderate + light rain but on days when it got it , the rains were closest to 2 inches
whereas in 1910 u got more number of such days , but its possible each day u got it closer to the lower end of the slab which is around one

So only D sounds possible to me
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14 Jun 2008, 17:22
D.

The question is "COULD" be possible.

As mentioned above, C cannot be possible because its contradicting the evidence.

In short: The evidence leaves out heavy rain days from 1990.

This is possible:
Heavy rain fell on many of the moderate rain days.
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14 Jun 2008, 19:42
D here
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14 Jun 2008, 23:57
OA is A
Re: CR Rainfall   [#permalink] 14 Jun 2008, 23:57

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