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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