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There were 36.000 hardback copies of a certain novel sold

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There were 36.000 hardback copies of a certain novel sold [#permalink] New post 18 May 2007, 22:42
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16. 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


I could solve this problem but getting a different answer. Please suggest..
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 [#permalink] New post 18 May 2007, 23:37
h1=hardback before paperback was issued, hd=hardback after paperback was issued, pd=paperback

h1 = 36000
pd = 9hd

441000 = 36000 + 10hd
hd = 40500
pd = 364500
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Re: Hardcover and paperback [#permalink] New post 18 May 2007, 23:38
Amit05 wrote:
16. 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


I could solve this problem but getting a different answer. Please suggest..


H = hardback
P = paperback
9H = P

=>36,000 + P + P/9 = 441,000
=> P = 364,500

(C) it is
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 [#permalink] New post 19 May 2007, 02:59
mNeo wrote:
h1=hardback before paperback was issued, hd=hardback after paperback was issued, pd=paperback

h1 = 36000
pd = 9hd

441000 = 36000 + 10hd
hd = 40500
pd = 364500


Got it.. I was taking it as 36000 + 9 (hd + 36000) = 441 000, counting the hardcover edition before paperback also.. Fell in the trap of GMAT.. :(

Thanks
  [#permalink] 19 May 2007, 02:59
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