Rates for having a manuscript typed at a certain typing : GMAT Problem Solving (PS)
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# Rates for having a manuscript typed at a certain typing

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Rates for having a manuscript typed at a certain typing [#permalink]

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12 Jun 2008, 02:06
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Rates for having a manuscript typed at a certain typing service are $5 per page for the first time a page is typed and$3 per page each time a page is revised. If a certain manuscript has 100 pages, of which 40 were revised only once, 10 were revised twice, and the rest required no revisions, what was the total cost of having the manuscript typed?

(A) $430 (B)$620
(C) $650 (D)$680
(E) $770 Do you think that 40 includes 10? Thanks! English is something awful [Reveal] Spoiler: OA _________________ Manager Joined: 26 Mar 2008 Posts: 64 Schools: Duke '13 Followers: 1 Kudos [?]: 11 [2] , given: 1 Re: OG11. PS [#permalink] ### Show Tags 12 Jun 2008, 03:26 2 This post received KUDOS 50 pages typed 1x 40 pages typed 2x (original + one revision) 10 pages typed 3x (original + two revisions) 50(5)+40(5+3)+10(5+3+3)=250+320+110=680 Answer - D Manager Joined: 27 Oct 2009 Posts: 149 Location: Montreal Schools: Harvard, Yale, HEC Followers: 1 Kudos [?]: 82 [0], given: 18 Re: OG11. PS [#permalink] ### Show Tags 15 Jan 2011, 20:04 I thought the the ones receiving 1st review include ones with no review and the ones receiving 2rd review include the one with 1st review and no review. 10*(5+3+3)+(40-10)*(5+3)+(100-40)*5 = 110+240+300 = 650 This is very tricky, and there is answer (C_ that fits my reasoning (650). Can some one please explain why my reasoning is not correct? Math Expert Joined: 02 Sep 2009 Posts: 36638 Followers: 7106 Kudos [?]: 93647 [6] , given: 10583 Re: OG11. PS [#permalink] ### Show Tags 16 Jan 2011, 01:47 6 This post received KUDOS Expert's post 3 This post was BOOKMARKED ezinis wrote: I thought the the ones receiving 1st review include ones with no review and the ones receiving 2rd review include the one with 1st review and no review. 10*(5+3+3)+(40-10)*(5+3)+(100-40)*5 = 110+240+300 = 650 This is very tricky, and there is answer (C_ that fits my reasoning (650). Can some one please explain why my reasoning is not correct? "40 pages were revised once" - so how can 10 pages which were revised TWICE be from a group which was only revised ONCE? Rates for having a manuscript typed at a certain typing service are$5 per page for the first time a page is typed and $3 per page each time a page is revised. If a certain manuscript has 100 pages, of which 40 were revised only once, 10 were revised twice, and the rest required no revisions, what was the total cost of having the manuscript typed? (A)$430
(B) $620 (C)$650
(D) $680 (E)$770

For 100-40-10=50 pages only cost is 5$per page for the first time page is typed - 50*5=250$;
For 40 pages the cost is: first time 5$+ 3$ of the first revision - 40*(5+3)=320$; For 10 pages the cost is: first time 5$ + 3$of the first revision + 3$ of the second revision - 10(5+3+3)=110$; Total: 250+320+110=680$.

OR:
100*5+40*3+10(3+3)=500+120+60=680.

Hope it's clear.
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16 Jan 2011, 12:36
Thanks bunnuel, I get it now. I need to be more careful with my reading (. +1 for you.
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Re: Rates for having a manuscript typed at a certain typing [#permalink]

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24 Sep 2014, 19:12
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Re: Rates for having a manuscript typed at a certain typing [#permalink]

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24 Sep 2014, 21:54
Total cost = 50 * (New) + 40 (New + Revision1) + 10 * (New + Revision1 + Revision2)

Total cost = 50 * 5 + 40 * (5+3) + 10 * (5+3+3)

= 250 + 320 + 110

= 680

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Re: Rates for having a manuscript typed at a certain typing [#permalink]

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31 Oct 2015, 19:29
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Re: Rates for having a manuscript typed at a certain typing [#permalink]

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18 Oct 2016, 13:50
Bunuel
in rates-for-having-a-manuscript-typed-at-a-certain-typing-65312.html#p853185

I dont understand why answer is 100*5+40*3+10(3+3)
and not 100*5+40*3+10(3).

Indeed, 100pages are typed, 40 are revised once, 10 are revised twice. Which means that we must add 10*3 because we have already counted their first revision in 40*3. Why aren't we double counting?

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Re: Rates for having a manuscript typed at a certain typing [#permalink]

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20 Oct 2016, 05:12
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sondenso wrote:
Rates for having a manuscript typed at a certain typing service are $5 per page for the first time a page is typed and$3 per page each time a page is revised. If a certain manuscript has 100 pages, of which 40 were revised only once, 10 were revised twice, and the rest required no revisions, what was the total cost of having the manuscript typed?

(A) $430 (B)$620
(C) $650 (D)$680
(E) $770 We are given that the manuscript has 100 pages, and, of those pages, 40 were revised once, 10 were revised twice, and the remaining 50 pages had no revisions. Thus, the charge for the 50 pages that required no revisions was 50 x$5 = $250. Next we can determine the total charge for the 40 pages that were revised once. We have an initial charge of$5 per page and an extra charge of $3 per page for the revision. Thus, the total cost was 40 x ($5 + $3) = 40 x$8 = $320. Finally, we can determine the total cost for the 10 pages that were revised twice. We again have an initial charge of$5 and then a charge of $3 for each revision. Thus, the total cost was 10 x ($5 + $3 +$3) = 10 x $11 =$110.

Therefore, the total cost of all 100 pages is $250 +$320 + $110 =$680.

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Rates for having a manuscript typed at a certain typing [#permalink]

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20 Oct 2016, 11:42
What I find misleading is that it could be understood that the pages revised twice are a subset of the pages that were revised once. - some of the pages revised once were revised twice.

I guess my confusion stems from my confusion between one time-- which could imply more than one- and once- only one.

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Rates for having a manuscript typed at a certain typing   [#permalink] 20 Oct 2016, 11:42
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