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A particular library has 75 books in a special collection

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Intern
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A particular library has 75 books in a special collection  [#permalink]

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New post 15 Nov 2010, 17:12
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Question Stats:

76% (02:11) correct 24% (02:43) wrong based on 160 sessions

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A particular library has 75 books in a special collection, all of which were in the library at the beginning of the month. These book are occasionally loaned out through an inter-library program. If, by the end of the month, 65 percent of books that were loaned out are returned and there are 68 books in the special collection at that time, how many books of the special collection were loaned out during that month?

A. 20
B. 30
C. 35
D. 40
E. 55
Intern
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Re: problem solving  [#permalink]

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New post 15 Nov 2010, 17:45
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there are 7 books less(75-68) which represents 35% of the loaned books (100-65)
So total loaned out books = 20
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Re: problem solving  [#permalink]

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New post 15 Jun 2013, 05:59
krushna wrote:
there are 7 books less(75-68) which represents 35% of the loaned books (100-65)
So total loaned out books = 20



I didn't understand How did we get 100?
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Re: problem solving  [#permalink]

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New post 15 Jun 2013, 06:06
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fozzzy wrote:
krushna wrote:
there are 7 books less(75-68) which represents 35% of the loaned books (100-65)
So total loaned out books = 20



I didn't understand How did we get 100?


A particular library has 75 books in a special collection, all of which were in the library at the beginning of the month. These book are occasionally loaned out through an inter-library program. If, by the end of the month, 65 percent of books that were loaned out are returned and there are 68 books in the special collection at that time, how many books of the special collection were loaned out during that month?

A. 20
B. 30
C. 35
D. 40
E. 55

Total = 75 books.

65% of books that were loaned out are returned --> 100%-65%=35% of books that were loaned out are NOT returned.
Now, there are 68 books, thus 76-68=7 books are NOT returned.

{loaned out}*0.35=7 --> {loaned out}=20.

Answer: A.
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Re: A particular library has 75 books in a special collection  [#permalink]

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New post 23 Nov 2019, 11:39
Hello from the GMAT Club BumpBot!

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).

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Re: A particular library has 75 books in a special collection   [#permalink] 23 Nov 2019, 11:39
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