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It costs $1,000 to make the first thousand copies of a book and x doll

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It costs $1,000 to make the first thousand copies of a book and x doll  [#permalink]

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New post 24 Oct 2017, 00:51
00:00
A
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C
D
E

Difficulty:

  35% (medium)

Question Stats:

84% (01:22) correct 16% (01:43) wrong based on 44 sessions

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It costs $1,000 to make the first thousand copies of a book and x dollars to make each subsequent copy. If it costs a total of $7,230 to make the first 8,000 copies of a book, what is x?

(A) .89
(B) .90375
(C) 1.00
(D) 89
(E) 90.375

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Re: It costs $1,000 to make the first thousand copies of a book and x doll  [#permalink]

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New post 24 Oct 2017, 02:01
$x for each copy after 1000 copies.
$7230 dollars to make 8000 copies => $1000 for the first 1000 copies and $6230 for the rest 7000 copies
x = 6230/7000 = $0.89

Answer is A.
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Re: It costs $1,000 to make the first thousand copies of a book and x doll  [#permalink]

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New post 24 Oct 2017, 03:06
A

It costs a total of $7,230 to make the first 8,000 copies of a book.
It costs $1,000 to make the first thousand copies of a book and x dollars to make each subsequent copy.

Thus, (8000-1000)*x = 7230-1000 dollars
7000x = 6230
x = 0.89 dollars
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Re: It costs $1,000 to make the first thousand copies of a book and x doll  [#permalink]

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New post 26 Oct 2017, 14:48
Bunuel wrote:
It costs $1,000 to make the first thousand copies of a book and x dollars to make each subsequent copy. If it costs a total of $7,230 to make the first 8,000 copies of a book, what is x?

(A) .89
(B) .90375
(C) 1.00
(D) 89
(E) 90.375


We can create the following equation:

7230 = 1000 + 7000x

6230 = 7000x

6230/7000 = x

x = 6.23/7 = 0.89

Answer: A
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Re: It costs $1,000 to make the first thousand copies of a book and x doll &nbs [#permalink] 26 Oct 2017, 14:48
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It costs $1,000 to make the first thousand copies of a book and x doll

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