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Last Sunday a certain store sold copies of Newspaper

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Senior Manager
Joined: 15 Sep 2011
Posts: 348
Location: United States
WE: Corporate Finance (Manufacturing)
Last Sunday a certain store sold copies of Newspaper [#permalink]

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Updated on: 10 Aug 2015, 03:14
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95% (hard)

Question Stats:

57% (03:19) correct 43% (03:34) wrong based on 136 sessions

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Last Sunday a certain store sold copies of Newspaper A for $1.00 each and copies of Newspaper B for$4 each, and the store sold no other newspapers that day. If $$r$$ percent of the store's revenue from newspaper sales was from Newspaper A and if $$p$$ percent of the newspapers that the store sold were copies of Newspaper A, which of the following expresses $$p$$ in terms of $$r$$?

A. $$\frac{{100+5r}}{{400r}}$$

B. $$\frac{{400r}}{{100+5r}}$$

C. $$\frac{{100+3r}}{{400r}}$$

D. $$\frac{{400r}}{{100+3r}}$$

E. $$\frac{{100r}}{{100+5r}}$$

Question from OG 13, but with a twist. Anybody know how to solve without having to solve for $$r$$ first?
[Reveal] Spoiler: OA

Originally posted by mejia401 on 09 Aug 2015, 15:25.
Last edited by mejia401 on 10 Aug 2015, 03:14, edited 1 time in total.
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Posts: 8024
Location: Pune, India
Re: Last Sunday a certain store sold copies of Newspaper [#permalink]

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09 Aug 2015, 23:23
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mejia401 wrote:
Last Sunday a certain store sold copies of Newspaper A for $1.00 each and copies of Newspaper B for$4 each, and the store sold no other newspapers that day. If $$r$$ percent of the store's revenue from newspaper sales was from Newspaper A and if $$p$$ percent of the newspapers that the store sold were copies of Newspaper A, which of the following expresses $$p$$ in terms of $$r$$?

A. $$\frac{{1+5r}}{{400r}}$$

B. $$\frac{{400r}}{{1+5r}}$$

C. $$\frac{{1+3r}}{{400r}}$$

D. $$\frac{{400r}}{{1+3r}}$$

E. $$\frac{{100r}}{{1+5r}}$$

Question from OG 13, but with a twist. Anybody know how to solve without having to solve for $$r$$ first?

The options given are not correct (I assume you have made modifications). You have assumed a fraction value for r (e.g. 1/2) and not percent value (e.g. 50).
When you say r percent in the question, you are implying that r will take values from 0 to 100. But in that case, your options are incorrect. They assume that r will take values from 0 to 1.
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Get started with Veritas Prep GMAT On Demand for $199 Veritas Prep Reviews Senior Manager Joined: 15 Sep 2011 Posts: 348 Location: United States WE: Corporate Finance (Manufacturing) Re: Last Sunday a certain store sold copies of Newspaper [#permalink] Show Tags 10 Aug 2015, 03:18 VeritasPrepKarishma wrote: mejia401 wrote: Last Sunday a certain store sold copies of Newspaper A for$1.00 each and copies of Newspaper B for $4 each, and the store sold no other newspapers that day. If $$r$$ percent of the store's revenue from newspaper sales was from Newspaper A and if $$p$$ percent of the newspapers that the store sold were copies of Newspaper A, which of the following expresses $$p$$ in terms of $$r$$? A. $$\frac{{1+5r}}{{400r}}$$ B. $$\frac{{400r}}{{1+5r}}$$ C. $$\frac{{1+3r}}{{400r}}$$ D. $$\frac{{400r}}{{1+3r}}$$ E. $$\frac{{100r}}{{1+5r}}$$ Question from OG 13, but with a twist. Anybody know how to solve without having to solve for $$r$$ first? The options given are not correct (I assume you have made modifications). You have assumed a fraction value for r (e.g. 1/2) and not percent value (e.g. 50). When you say r percent in the question, you are implying that r will take values from 0 to 100. But in that case, your options are incorrect. They assume that r will take values from 0 to 1. VeritasPrepKarishma Thank you . Do you think modifications to an OG question adds value to the forum (even if the answer choices are right:)? Veritas Prep GMAT Instructor Joined: 16 Oct 2010 Posts: 8024 Location: Pune, India Re: Last Sunday a certain store sold copies of Newspaper [#permalink] Show Tags 10 Aug 2015, 22:25 mejia401 wrote: VeritasPrepKarishma wrote: mejia401 wrote: Last Sunday a certain store sold copies of Newspaper A for$1.00 each and copies of Newspaper B for $4 each, and the store sold no other newspapers that day. If $$r$$ percent of the store's revenue from newspaper sales was from Newspaper A and if $$p$$ percent of the newspapers that the store sold were copies of Newspaper A, which of the following expresses $$p$$ in terms of $$r$$? A. $$\frac{{1+5r}}{{400r}}$$ B. $$\frac{{400r}}{{1+5r}}$$ C. $$\frac{{1+3r}}{{400r}}$$ D. $$\frac{{400r}}{{1+3r}}$$ E. $$\frac{{100r}}{{1+5r}}$$ Question from OG 13, but with a twist. Anybody know how to solve without having to solve for $$r$$ first? The options given are not correct (I assume you have made modifications). You have assumed a fraction value for r (e.g. 1/2) and not percent value (e.g. 50). When you say r percent in the question, you are implying that r will take values from 0 to 100. But in that case, your options are incorrect. They assume that r will take values from 0 to 1. VeritasPrepKarishma Thank you . Do you think modifications to an OG question adds value to the forum (even if the answer choices are right:)? Yes, I advise people to think how small changes in the question can impact their solution. It helps in better understanding. Though, if you do put up such a question on the forum, I suggest you tag it as "self made" and ensure that the question stem as well as the options are correct. I am sure you wouldn't want people to worry about why their answer doesn't match any option. _________________ Karishma Veritas Prep | GMAT Instructor My Blog Get started with Veritas Prep GMAT On Demand for$199

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Re: Last Sunday a certain store sold copies of Newspaper [#permalink]

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16 Aug 2015, 16:54
mejia401 wrote:
Last Sunday a certain store sold copies of Newspaper A for $1.00 each and copies of Newspaper B for$4 each, and the store sold no other newspapers that day. If $$r$$ percent of the store's revenue from newspaper sales was from Newspaper A and if $$p$$ percent of the newspapers that the store sold were copies of Newspaper A, which of the following expresses $$p$$ in terms of $$r$$?

A. $$\frac{{100+5r}}{{400r}}$$

B. $$\frac{{400r}}{{100+5r}}$$

C. $$\frac{{100+3r}}{{400r}}$$

D. $$\frac{{400r}}{{100+3r}}$$

E. $$\frac{{100r}}{{100+5r}}$$

Question from OG 13, but with a twist. Anybody know how to solve without having to solve for $$r$$ first?

Similar question to practice: last-sunday-a-certain-store-sold-copies-of-newspaper-a-for-101739.html
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Re: Last Sunday a certain store sold copies of Newspaper [#permalink]

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30 Mar 2018, 04:47
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Re: Last Sunday a certain store sold copies of Newspaper   [#permalink] 30 Mar 2018, 04:47
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