Last Sunday a certain store sold copies of Newspaper A for $1.00 each and copies of Newspaper B for $1.25 each, and the store sold no other newspapers that day. If r percent of the store’s revenues 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 r in terms of p?	Choose the correct choice from the following choices
A) 100p/(125 – p)
B) 150p/(250 – p)
C) 300p/(375 – p)
D) 400p/(500 – p)
E) 500p/(625 – p)
News A) A= $1   (News B) B = $1.25 or $5/4   Total newspaper sold= x   No. of A Newspaper sold = p/100 *x is r% of total revenue   Total revenue: p/100*x*$1 + (100-p)/100*x*$5/4   Equation: px/100=r/100(px/100+(500/4-5p/4)x/100)   px/100=r/100(4px+500x-5px/400)   removing common terms as 100 and x out and keeping only r on RHS   p=r(500-p)/400 or r=400p/(500-p)..Answer..400p/(500 – p)
<result>D</result>
Last Sunday a certain store sold copies of Newspaper A for $1.00 each and copies of Newspaper B for $1.25 each, and the store sold no other newspapers that day. If r percent of the store’s revenues 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 r in terms of p?