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Paper copies - DS

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by karthikpandian19 » Thu Dec 15, 2011 7:10 pm
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
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by Anurag@Gurome » Thu Dec 15, 2011 8:10 pm
karthikpandian19 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
Let x be the no. of hardback copies sold after they introduced the paperback.
Then the total number of paperbacks sold = 9 * x
Total no. of copies sold = 36 + x + 9 * x = 441
10x = 405
x = 40.5
No. of paperbacks = 40.5 * 9 = 364.50

The correct answer is C.
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by ArunangsuSahu » Sun Jan 01, 2012 8:51 am
9x+x=441-36

9x=364.5
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