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A certain library was experiencing a problem with lost books,

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A certain library was experiencing a problem with lost books,  [#permalink]

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New post 15 Mar 2018, 17:20
2
00:00
A
B
C
D
E

Difficulty:

  55% (hard)

Question Stats:

68% (01:54) correct 32% (02:16) wrong based on 125 sessions

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A certain library was experiencing a problem with lost books, which depleted the library of approximately 2 percent of its collection every year. In the spring, the director of the library instituted a new system of far heavier fines for library patrons who lost books. After three months of operation under the new system, the director announced that the new system, although unpopular, was working. As evidence, he stated that the number of books reported lost during the three-month period was only one-third the number that had been reported lost during the preceding three months.
Which of the following, if true, casts the most doubt on the director's claims about the effectiveness of the new system?
A. In the past, the number of books reported lost during any three-month period tended to fluctuate as much as 50 percent up or down.
B. Several of the library's patrons, angered by the severity of the new system, had petitioned the library's governing board to have the director fired.
C. Children under fifteen years of age, the age-group of patrons most likely to lose books, on average borrow twice as many books during the summer as they do during the rest of the year when they are in school.
D. Some patrons, in order to avoid the increased fine, delayed reporting their books lost in the hopes that they eventually might find the books.
E. Although the fine for a lost book was substantially greater during the three-month period than it had been previously, the library's revenue derived from lost-book fines decreased over the period.

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Re: A certain library was experiencing a problem with lost books,  [#permalink]

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New post 16 Mar 2018, 02:51
1
I'd go with D. This option gives an alternate reason

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Re: A certain library was experiencing a problem with lost books,  [#permalink]

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New post 16 Mar 2018, 07:26
IMO D.

Though C also seems good but it does not weaken it substantially. Option C conveys the message that in future, i.e. post summer more or same amount of books might be lost.

But here we need to talk on the present trend.

Thus, D wins.

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Re: A certain library was experiencing a problem with lost books,  [#permalink]

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New post 17 Mar 2018, 05:36
Hi
IMO A,C,D all are good contender for weakning the director's conclusion

but A would be the best

as D stated 'Some of the patrons' it could means only 2% or 5% patrons have not reported book loss then conlcusion will hold tight

so Experts could you please shed some light on this
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A certain library was experiencing a problem with lost books,  [#permalink]

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New post 18 Mar 2018, 05:13
1
aragonn wrote:
A certain library was experiencing a problem with lost books, which depleted the library of approximately 2 percent of its collection every year. In the spring, the director of the library instituted a new system of far heavier fines for library patrons who lost books. After three months of operation under the new system, the director announced that the new system, although unpopular, was working. As evidence, he stated that the number of books reported lost during the three-month period was only one-third the number that had been reported lost during the preceding three months.
Which of the following, if true, casts the most doubt on the director's claims about the effectiveness of the new system?
A. In the past, the number of books reported lost during any three-month period tended to fluctuate as much as 50 percent up or down.
B. Several of the library's patrons, angered by the severity of the new system, had petitioned the library's governing board to have the director fired.
C. Children under fifteen years of age, the age-group of patrons most likely to lose books, on average borrow twice as many books during the summer as they do during the rest of the year when they are in school.
D. Some patrons, in order to avoid the increased fine, delayed reporting their books lost in the hopes that they eventually might find the books.
E. Although the fine for a lost book was substantially greater during the three-month period than it had been previously, the library's revenue derived from lost-book fines decreased over the period.





A. In the past, the number of books reported lost during any three-month period tended to fluctuate as much as 50 percent up or down. Incorrect, the director is comparing 6 months in total, 3 before the new system, and three after the new system

B. Several of the library's patrons, angered by the severity of the new system, had petitioned the library's governing board to have the director fired. Incorrect, Doesn't concern the argument.

C. Children under fifteen years of age, the age-group of patrons most likely to lose books, on average borrow twice as many books during the summer as they do during the rest of the year when they are in school. Tempting, but Incorrect. We do not know the exact number of children, who use the library, it could be 2 or 200?

D. Some patrons, in order to avoid the increased fine, delayed reporting their books lost in the hopes that they eventually might find the books. CORRECT! This casts the most doubt on the directors claim, as the number of books reported lost, by the director, during the three-month period, wont include the books which were delayed in reporting lost.

E. Although the fine for a lost book was substantially greater during the three-month period than it had been previously, the library's revenue derived from lost-book fines decreased over the period. Incorrect, Doesn't concern the argument.
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A certain library was experiencing a problem with lost books, &nbs [#permalink] 18 Mar 2018, 05:13
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