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In a certain classroom, there are 80 books, of which 24 are

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In a certain classroom, there are 80 books, of which 24 are [#permalink] New post 09 Jun 2010, 11:00
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In a certain classroom, there are 80 books, of which 24 are fiction and 23 are written in Spanish. How many of the fiction books are written in Spanish?

(1) Of the fiction books, there are 6 more that are not written in Spanish than are written in Spanish.
(2) Of the books written in Spanish, there are 5 more nonfiction books than fiction books.

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Re: OG-DS - In a certain classroom [#permalink] New post 09 Jun 2010, 15:17
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In a certain classroom, there are 80 books, of which 24 are fiction and 23 are written in Spanish. How many of the fiction books are written in Spanish?

Given:
Attachment:
Fiction1.JPG
Fiction1.JPG [ 10.74 KiB | Viewed 2368 times ]

(1) Of the fiction books, there are 6 more that are not written in Spanish than are written in Spanish.
Attachment:
Fiction2.JPG
Fiction2.JPG [ 10.95 KiB | Viewed 2368 times ]
So, x+x+6=24 --> x=9. Sufficient.

(2) Of the books written in Spanish, there are 5 more nonfiction books than fiction books
Attachment:
Fiction3.JPG
Fiction3.JPG [ 11 KiB | Viewed 2367 times ]
So, x+x+5=23 --> x=9. Sufficient.

Answer: D. (Total # of books is redundant information).

Hope it helps.
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Re: OG-DS - In a certain classroom   [#permalink] 09 Jun 2010, 15:17
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