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Scientists have modified feed corn genetically, increasing its resista

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Scientists have modified feed corn genetically, increasing its resista [#permalink]

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Scientists have modified feed corn genetically, increasing its resistance to insect pests. Farmers who tried out the genetically modified corn last season applied less insecticide to their corn fields and still got yields comparable to those they would have gotten with ordinary corn. Ordinary corn seed, however, costs less, and what these farmers saved on insecticide rarely exceeded their extra costs for seed. Therefore, for most feed-corn farmers, switching to genetically modified seed would be unlikely to increase profits.

Which of the following would it be most useful to know in order to evaluate the argument?

(A) Whether there are insect pests that sometimes reduce feed-corn yields, but against which commonly used insecticides and the genetic modification are equally ineffective

(B) Whether the price that farmers receive for feed corn has remained steady over the past few years

(C) Whether the insecticides typically used on feed corn tend to be more expensive than insecticides typically used on other crops

(D) Whether most of the farmers who tried the genetically modified corn last season applied more insecticide than was actually necessary

(E) Whether, for most farmers who plant feed corn, it is their most profitable crop
[Reveal] Spoiler: OA

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Last edited by hazelnut on 23 Oct 2017, 17:27, edited 1 time in total.
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Re: Scientists have modified feed corn genetically, increasing its resista [#permalink]

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ykaiim wrote:
Scientists have modified feed corn genetically, increasing its resistance to insect pests. Farmers who tried out the genetically modifi ed corn last season applied less insecticide to their corn fi elds and still got yields comparable to those they would have gotten with ordinary corn. Ordinary corn seed, however, costs less, and what these farmers saved on insecticide rarely exceeded their extra costs for seed. Therefore, for most feed-corn farmers, switching to genetically modifi ed seed would be unlikely to increase profits.

Which of the following would it be most useful to know in order to evaluate the argument?

(A) Whether there are insect pests that sometimes reduce feed-corn yields, but against which commonly used insecticides and the genetic modifi cation are equally ineffective>>> Out of scope
(B) Whether the price that farmers receive for feed corn has remained steady over the past few years >>> This in general >>> Output is feed corn in both the cases>>> Topic at issue is type of seeds used and other expenses.
(C) Whether the insecticides typically used on feed corn tend to be more expensive than insecticides typically used on other crops.>>> Even if the insecticide with new crop are more expensive...the amount of insecticides used MAY or MAY NOT drive the overall cost down..!!!
(D) Whether most of the farmers who tried the genetically modified corn last season applied more insecticide than was actually necessary>>>> Given the profit was comparable, BUT if amount of insecticides with new crop would have reduced...We definitely get profit with new crop..!! >>>CORRECT
(E) Whether, for most farmers who plant feed corn, it is their most profi table crop.>>> Out of scope



IMHO D.

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Re: Scientists have modified feed corn genetically, increasing its resista [#permalink]

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New post 13 May 2010, 09:33
Between B and D. I go with B.

D >> The issue is whether the savings in the cost of ordinary corn seeds offset the cost of pesticides (for ordinary corn). It is given that GM corn uses less pesticide and still gives comparable output. If it was a 'weaken the argument' question I would have gone with D.

B >> When we have the word 'profit' we have to think about the sale price. So it will be good to get this information in order to derive the conclusion.

OA?

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Re: Scientists have modified feed corn genetically, increasing its resista [#permalink]

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New post 13 May 2010, 12:58
Hi Economist , ur explanation does make sense but why would we care about the price of the feed corn that farmers received in the past....i did not consider this option because the conclusion is about the profits in the future....i am sure i am missing something... :(

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Re: Scientists have modified feed corn genetically, increasing its resista [#permalink]

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New post 14 May 2010, 02:17
I think its D and not B b'caz the argument is comparing the yield in last year with current year so there shouldnot be any issue/consideration about last year's profit and current year's profit...

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Re: Scientists have modified feed corn genetically, increasing its resista [#permalink]

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ykaiim wrote:
Scientists have modified feed corn genetically, increasing its resistance to insect pests. Farmers who tried out the genetically modifi ed corn last season applied less insecticide to their corn fi elds and still got yields comparable to those they would have gotten with ordinary corn. Ordinary corn seed, however, costs less, and what these farmers saved on insecticide rarely exceeded their extra costs for seed. Therefore, for most feed-corn farmers, switching to genetically modifi ed seed would be unlikely to increase profits.

Which of the following would it be most useful to know in order to evaluate the argument?

(A) Whether there are insect pests that sometimes reduce feed-corn yields, but against which commonly used insecticides and the genetic modifi cation are equally ineffective
(B) Whether the price that farmers receive for feed corn has remained steady over the past few years
(C) Whether the insecticides typically used on feed corn tend to be more expensive than insecticides typically used on other crops
(D) Whether most of the farmers who tried the genetically modified corn last season applied more insecticide than was actually necessary
(E) Whether, for most farmers who plant feed corn, it is their most profi table crop

It has to either B or D.
I would go with D.
Reason: Conclusion of the argument is switching to genetically modified seed would be unlikely to increase profits. Profit can increase in case the input cost decreases or output price increases.
B: Not telling anything directly instead it talks about few years.
D: From the stmt directly we can say whether profit increases or remain same.

Hence D.
whats OA?

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Re: Scientists have modified feed corn genetically, increasing its resista [#permalink]

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New post 14 May 2010, 10:53
D!
Are you guys kidding with B? that is a dumb move

The question is asking what statements would likely affect the argument..the argument which is switching over to genetically modified feed corn is or isn't profitable. D affects the profitability of such a move. B talks about price of feed corn being steady over the past several years. It does not really matter what the price was in the past...that does not affect the profitability question going forward. Whether it was stable or fluctuating does not help me make a decision whether to switch to genetically modified feed or not. I would have to make an assumption that if it were fluctuating in the past it would be fluctuating in the future. I can't make assumptions like that on a critical reasoning question. B is too far a stretch.

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Re: Scientists have modified feed corn genetically, increasing its resista [#permalink]

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option B is completely vague, if the price is not steady then either it may go down or up . so we are not sure that price is going up or down so the profits can go up or down, whereas in option D we are saving on Cost hence more the saving more the profit hence D must be the ans
what is the OA

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Re: Scientists have modified feed corn genetically, increasing its resista [#permalink]

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New post 10 Oct 2010, 07:10
said B the prices of GM corn have risen, would that lead to any change in answer?

you know, I felt that if the money that farmer used to get for typical corn was less than the amount they may earn for GM corn, the argument would be questioned! am I wrong?

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Re: Scientists have modified feed corn genetically, increasing its resista [#permalink]

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New post 28 Apr 2011, 11:06
clear enough D .
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Re: Scientists have modified feed corn genetically, increasing its resista [#permalink]

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New post 28 Apr 2011, 11:08
A, B, and E are clearly irrelevant. D seems superior to C as the insecticide would presumably be the same to make this a basis of comparison. D it is.
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Re: Scientists have modified feed corn genetically, increasing its resista [#permalink]

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New post 06 Oct 2011, 10:56
Scientists have modified feed corn genetically, increasing its resistance to insect pests. Farmers who tried out the genetically modified corn last season applied less insecticide to their corn fields and still got yields comparable to those they would have gotten with ordinary corn. Ordinary corn seed, however, costs less, and what these farmers saved on insecticide rarely exceeded their extra costs for seed. Therefore, for most feed-corn farmers, switching to genetically modified seed would be unlikely to increase profits.

Which of the following would it be most useful to know in order to evaluate the argument?


(D) Whether most of the farmers who tried the genetically modified corn last season applied more insecticide than was actually necessary Answer = NO
The argument already mentioned that Less insecticide was applied, :roll:

I choose A because: More Yield => More Sale => Higher Profit, so according to A if there are insect pests that couldn't be eradicated both by insecticides and by genetic modification, which will result in lower yeild => lower sale=> lower profit, Hence switching from ordinary seed to genetic is useless ...
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Re: Scientists have modified feed corn genetically, increasing its resista [#permalink]

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Of course, we know the OA and we also know the reasoning. Still let us see the logical flow of the argument.

For same yield,

Premise 1: Conventional Corn-- uses X kg of Pesticide but seed is less expensive.
Premise 2: GM Corn-- uses 'less than X kg' of Pesticide but seed is expensive.
Conclusion: Though 'less than X kg' of Pesticide but seed is expensive. So, No profit INCREASE.


Assumption: Profit = Selling Price - Total Cost (pesticide + seed)

Option D introduces a new information which states that 'less than X kg' is still very high than 'actually necessary'. So, if we accept the info provided by Option D, Total Cost will reduce if we use only 'necessary' qty of pesticide.

For those, who still find Option A and Option B convincing, read below:

A. (I am not very happy with Official explanation given in the book but there is still another big flaw)
Insects SOMETIMES might infest the crop and neither pesticide or genetic modification will save it. So what, it might infest the crop once in a century. These unavoidable apocalyptic events might happen sometime. We should not take SOMETIMES occurring events to affect our decisions.

Take for example a situation:
Mayor: We should build a high rise building to accommodate people living in slums, which occupy large city area. The area saved can be used to build schools and hospitals.
Citizen: In every 10000 years, one earthquake hits the city. So, we should not build the high rise building because an earthquake might occur SOMETIME.

You know how dumb that citizen will sound!

B. If Selling Price increases, Profit will increase same for both types of farming, unless the changes in cost in Conventional farming are different from those in GM farming.

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Re: Scientists have modified feed corn genetically, increasing its resista [#permalink]

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New post 09 Dec 2012, 03:18
Good Question !

In the past, farmers used ordinary seeds in their farms, along with the insecticide to protect it from insects.
Now, last year few farmers used genetically modified insect resistant seeds, which are costlier than ordinary seeds. As seeds are already insect resistant, it require lesser or no amount of insecticide, lowering the cost on insecticides. Still, few farmers used insecticides.
Conclusion=> The above change is unlikely to increase profit.

Analysis:
In general, Profit= Sale- Cost.
As argument doesn't mention about sale, assuming its constant. So, profit in inversely proportional to cost. If cost is incresed, profit would decrease.
Old cost =cost(ordinary Seeds) + cost(insecticide)
New cost=cost(Genetically modified seeds) + cost(insecticide)


As in second case, genetically modified seeds are costlier, extra spending done on costlier seeds needs to be compensated by reducing the cost on insecticide.

For example,
Old cost = 10K(seeds) + 2 K( insecticide)
New cost= 11K (genetic seeds) + Cost of insecticide.


In second case, Farmers' spending of insecticide should be less than 1K for profitable business.

(A) Whether there are insect pests that sometimes reduce feed-corn yields, but against which commonly used insecticides and the genetic modification are equally ineffective. Contradicts the premise itself saying insecticides and modified seeds are ineffective.
(B) Whether the price that farmers receive for feed corn has remained steady over the past few years. price of corn is out of context.
(C) Whether the insecticides typically used on feed corn tend to be more expensive than insecticides typically used on other crops. Concern is about amount of insecticide, and not cost of insecticide
(D) Whether most of the farmers who tried the genetically modified ed corn last season applied more insecticide than was actually necessary. Correct, As genetically modified seeds are already insect resistant, more usage of insecticide will reduce the profit.
(E) Whether, for most farmers who plant feed corn, it is their most profitable crop. Its obvious truth that corns are profitable. This doesn't touch the premises itself.

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Re: Scientists have modified feed corn genetically, increasing its resista [#permalink]

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New post 18 Dec 2012, 19:26
umeshpatil wrote:
Good Question !

In the past, farmers used ordinary seeds in their farms, along with the insecticide to protect it from insects.
Now, last year few farmers used genetically modified insect resistant seeds, which are costlier than ordinary seeds. As seeds are already insect resistant, it require lesser or no amount of insecticide, lowering the cost on insecticides. Still, few farmers used insecticides.
Conclusion=> The above change is unlikely to increase profit.

Analysis:
In general, Profit= Sale- Cost.
As argument doesn't mention about sale, assuming its constant. So, profit in inversely proportional to cost. If cost is incresed, profit would decrease.
Old cost =cost(ordinary Seeds) + cost(insecticide)
New cost=cost(Genetically modified seeds) + cost(insecticide)


As in second case, genetically modified seeds are costlier, extra spending done on costlier seeds needs to be compensated by reducing the cost on insecticide.

For example,
Old cost = 10K(seeds) + 2 K( insecticide)
New cost= 11K (genetic seeds) + Cost of insecticide.


In second case, Farmers' spending of insecticide should be less than 1K for profitable business.

(A) Whether there are insect pests that sometimes reduce feed-corn yields, but against which commonly used insecticides and the genetic modification are equally ineffective. Contradicts the premise itself saying insecticides and modified seeds are ineffective.
(B) Whether the price that farmers receive for feed corn has remained steady over the past few years. price of corn is out of context.
(C) Whether the insecticides typically used on feed corn tend to be more expensive than insecticides typically used on other crops. Concern is about amount of insecticide, and not cost of insecticide
(D) Whether most of the farmers who tried the genetically modified ed corn last season applied more insecticide than was actually necessary. Correct, As genetically modified seeds are already insect resistant, more usage of insecticide will reduce the profit.
(E) Whether, for most farmers who plant feed corn, it is their most profitable crop. Its obvious truth that corns are profitable. This doesn't touch the premises itself.


Excellent post! Here is my thinking:

Profit = Revenue - Cost

So if the new seed is used, how much less insecticide can the farmer use to offset the marginal cost of the modified seed?

If the farmer can eliminate the cost of insecticide, perhaps the marginal cost of the seed will be offset by the savings from less pesticide use, resulting in less overall cost and greater profit.

Bottom line-what is the least amount of pesticide that the farmer can use?

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Re: Scientists have modified feed corn genetically, increasing its resista [#permalink]

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New post 12 Jul 2014, 03:22
D stands out. But even D seems to have a few flaws.

The cost of the genetically modified seeds is high so if they use insecticides there will be a loss. - strengthens the arg
If they do not use insecticides how can it be deemed a profit ? (the cost of the seeds is HIGH ) - how does this weaken the arg to effectively be the right answer?

Can someone plz help ?
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Re: Scientists have modified feed corn genetically, increasing its resista [#permalink]

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janxavier wrote:
D stands out. But even D seems to have a few flaws.

The cost of the genetically modified seeds is high so if they use insecticides there will be a loss. - strengthens the arg
If they do not use insecticides how can it be deemed a profit ? (the cost of the seeds is HIGH ) - how does this weaken the arg to effectively be the right answer?

Can someone plz help ?


Responding to a pm:

Premises:
Farmers who tried out the genetically modified corn last season applied less insecticide to their corn fields.
Farmers still got yields comparable to those they would have gotten with ordinary corn.
Genetically modified corn seed is more expensive and money saved on insecticide rarely exceeded their extra costs for seed.

Conclusion:
For most feed-corn farmers, switching to genetically modified seed would be unlikely to increase profits.

Based on previous year's experience, the author is concluding what will happen this year - profits will not increase if farmers use genetically modified seeds.

(B) Whether the price that farmers receive for feed corn has remained steady over the past few years
This information does not affect our this year's profit. If price has remained steady, it doesn't mean it will remain steady this year too.
So whether this year profit will increase or decrease or stay the same, we don't know.

(D) Whether most of the farmers who tried the genetically modified corn last season applied more insecticide than was actually necessary.
This question when answered will tell us whether we can decrease the amount of insecticide used this year. If last year farmers had used more insecticide than was required, perhaps we can decrease it this year without affecting the yield. If we decrease the amount of insecticide, we might decrease costs such that using modified crop seeds might lower our total costs this year. This will affect our profit this year.

Hence (D) is correct.
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Re: Scientists have modified feed corn genetically, increasing its resista [#permalink]

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New post 30 Aug 2014, 23:20
Hi e-gmat,

Just want to confirm my reasoning.

I don't have doubt why the answer is (D). I just want to confirm that the GAP identified by me was correct or not?

Premise: SC have made GMFC(genetically modified feed corn)
Premise: Farmers tried out and applied less insecticide on GMFC
Premise: The yields for GMFC and OFC(ordinary) were same.
Premise: The overall costs for OFC were less than those for GMFC.
Conclusion: Switching from OFC to GMFC is unlikely to increase profits.

GAP:

(1). The yield of GMFC is not valued more than that of OFC since GMFC uses less insecticide and the customers who buy yields value more for the yield that uses less insecticide.
Assumption: Hence, the price of yield of GMFC is not significantly more than that of yield of OFC.

Please confirm!
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Re: Scientists have modified feed corn genetically, increasing its resista [#permalink]

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New post 02 Jan 2015, 08:01
In the question.it says "Farmers who tried out the genetically modified corn last season applied less insecticide to their ..."
Here it clearly says the farmers used less insecticide...
Why option D is right ?

Posted from my mobile device

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Re: Scientists have modified feed corn genetically, increasing its resista [#permalink]

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New post 04 Jan 2015, 22:46
Kumarsaravana wrote:
In the question.it says "Farmers who tried out the genetically modified corn last season applied less insecticide to their ..."
Here it clearly says the farmers used less insecticide...
Why option D is right ?

Posted from my mobile device


You have to read the question very carefully:

"Farmers who tried out the genetically modified corn last season applied less insecticide to their corn fi elds and still got yields comparable to those they would have gotten with ordinary corn."
The argument says that farmers using modified corn applied less insecticide than the farmers using ordinary corn.

(D) Whether most of the farmers who tried the genetically modified corn last season applied more insecticide than was actually necessary
On the other hand, option (D) says that we need to evaluate whether the farmers who used modified corn applied more insecticide than was necessary i.e. whether even less insecticide was needed.

The comparison is with different things. Does it make sense now?
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