Since the conclusion says that EFCO keyboard reduces typing costs, we need an answer that weakens this conclusion. D is the answer.

yup... a definate D.. Fluke... kudos to you buddy for your effort in posting the OE and OA!!

So only option does the required job!

agree D. only one that fits the question presented

Hi Verbal Experts,
Can you please let me know what's wrong with option B?
B clearly says that EFCO is either as expensive as standard keyboards or less expensive than standard keyboards...hence, it follows that there will be NO immediate reduction of typing costs. Either typing cost will remain same or will go up.So, why B is discarded?

Whereas, option D clearly says that immediate typing cost will go up. So, do we really required any evidence that must say that cost should go up.

I think, even when cost remains the same the argument is weakened.

Please clarify.
_________________

Hi bagdmba,

Thank you for your query. Please find below my comments on your analysis that:

B clearly says that EFCO is either as expensive as standard keyboards or less expensive than standard keyboards...hence, it follows that there will be NO immediate reduction of typing costs. Either typing cost will remain same or will go up. So, why B is discarded?

My comments: First of all, choice B, if anything, is in the opposite line of thought than our job in this question. The question stem asks us to WEAKEN the conclusion that the replacement of standard keyboards with EFCO keyboards will result in immediate cost reduction. However, choice B states that EFCO keyboards require less frequent repair than do standard keyboards. This suggests that there is going to be a reduction in the operating costs of keyboards if we follow the author’s suggestion. Moving on, choice B only talks about the manufacturing costs of the two types of keyboards. We can’t conclude much about the price of a product from its manufacturing cost. At best, this information could only vaguely indicate that there is not going to be much difference between the one-time acquisition cost of an EFCO keyboard and that of a standard key-board. This understanding, combined with the lower operating costs of EFCO keyboards, goes on to show the merits of the author’s suggestion. Clearly, option B does not weaken the author’s logic in any way.

Choice D on the other hand, addresses the immediate cost reduction bit in the conclusion. It states that there are additional costs involved in going through with the replacement and these costs will have to be incurred rather immediately. Hence, it is the correct weakening choice.

Hope the above analysis helps .


Neeti.
_________________

(D) The more training and experience an employee has had with the standard keyboard, the more costly it is to train that employee to use the EFCO keyboard.

D is clear winner here

i really dont get why D is the answer. The sentence said nothing about employees

D is the only choice which weakens the argument.

(D) The more training and experience an employee has had with the standard keyboard, the more costly it is to train that employee to use the EFCO keyboard.

The conclusion is : Therefore, replacement of standard keyboards with the EFCO keyboard will result in an immediate reduction of typing costs.
So what answer choice that links the EFCO and other keyboard with respect to typing cost and also at same time, if true, would weaken the conclusion.

Conclusion :- replacement of standard keyboards with the EFCO keyboard will result in an immediate reduction of typing costs.
Weaken :- replacement of standard keyboards with the EFCO keyboard will not result in an immediate reduction of typing costs.

Option D fits the bill :-
The more training and experience an employee has had with the standard keyboard, the more costly it is to
train that employee to use the EFCO keyboard.
_________________

Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________