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# There were 36.000 hardback copies of a certain novel sold

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Manager
Joined: 05 Sep 2007
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Location: New York
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There were 36.000 hardback copies of a certain novel sold [#permalink]  25 Feb 2008, 11:11
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There were 36.000 hardback copies of a certain novel sold before the paperback version was issued. From the time the first paperback copy was sold until the last copy of the novel was sold. 9 times as many paperback copies as hardback copies were sold. If a total of 441.000 copies of the novel were sold in all, how many paperback copies were sold?
(A) 45.000
(B) 360.000
(C) 364.500
(D) 392.000
(E) 396.900
Director
Joined: 01 Jan 2008
Posts: 629
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Re: PS: Copies [#permalink]  25 Feb 2008, 11:25
el1981 wrote:
There were 36.000 hardback copies of a certain novel sold before the paperback version was issued. From the time the first paperback copy was sold until the last copy of the novel was sold. 9 times as many paperback copies as hardback copies were sold. If a total of 441.000 copies of the novel were sold in all, how many paperback copies were sold?
(A) 45.000
(B) 360.000
(C) 364.500
(D) 392.000
(E) 396.900

C. 36 + x + 9x = 441 -> 9x = (441-36)*9/10 = 364.5
SVP
Joined: 28 Dec 2005
Posts: 1583
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Re: PS: Copies [#permalink]  25 Feb 2008, 11:33
maratikus wrote:
el1981 wrote:
There were 36.000 hardback copies of a certain novel sold before the paperback version was issued. From the time the first paperback copy was sold until the last copy of the novel was sold. 9 times as many paperback copies as hardback copies were sold. If a total of 441.000 copies of the novel were sold in all, how many paperback copies were sold?
(A) 45.000
(B) 360.000
(C) 364.500
(D) 392.000
(E) 396.900

C. 36 + x + 9x = 441 -> 9x = (441-36)*9/10 = 364.5

same thing for me. 36,000 +h+p = 441,000 --> 35+h+p=441, where p=9h --> solve for h=40.5, and therefore p = 9*40.5 = 364.5
Manager
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Re: PS: Copies [#permalink]  25 Feb 2008, 18:05
36+x+9x=441
dont forget that we are looking for 9x?

CEO
Joined: 29 Mar 2007
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Re: PS: Copies [#permalink]  25 Feb 2008, 18:15
el1981 wrote:
There were 36.000 hardback copies of a certain novel sold before the paperback version was issued. From the time the first paperback copy was sold until the last copy of the novel was sold. 9 times as many paperback copies as hardback copies were sold. If a total of 441.000 copies of the novel were sold in all, how many paperback copies were sold?
(A) 45.000
(B) 360.000
(C) 364.500
(D) 392.000
(E) 396.900

10x+36,000=441,000

364,500 = 9x

C
Re: PS: Copies   [#permalink] 25 Feb 2008, 18:15
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