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Can any one explain?

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by envyramana » Mon Jul 07, 2008 11:26 am
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

OA C
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Answer is C

by sethids » Mon Jul 07, 2008 12:14 pm
Total number of copies sold = 441000.
Hardback copies sold prior to paperback launch = 36000
Total copies (hardback + paperback) sold when both versions were in market = 441,000 - 36,000 = 405,000.

Let x = no. of hardback copies sold.
=> 9x = no. of paperback copies sold.
9x + x = 405,000
=> 10x = 405,000
=> x = 40,500.

No. of paperback copies sold = 9 * 40500 = 364,500

Hence C is the answer.
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