Total no of newspaper sold = 100x, A newspaper = px, B = 100x-pxmitzwillrockgmat wrote: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?
A. 100p / (125 - p) B. 150p / (250 - p) C. 300p / (375 - p) D. 400p / (500 - p)
E. 500p / (625 - p)
Rev from A = $px Rev from B = $100x-px*1.25 Tot rev = px+125x-1.25px = 125x-0.25px
px/125x-0.25px= r/100,
r=100px/(125x-px/4)
r= 400px/(500-px) = 400p/(500-p)
Phew ! on second attempt