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 newspapers sales was from Newspaper A and if k percent of the newspapers that the store sold were copies of Newspaper A, which of the following expresses r in terms of k? Select:	A) 100p / (125 - p)	B) 150p / (250 - p)	C) 300p / (375 - p)	D) 400k / (500 - k)	E) 500p / (625 - p)
I have just started with qunats section .. I solved this by making two equations and got the answer ... However it was long way of doing it ...   I got the answer as : 100k /(125 - .25 k)...   Multiply this equation by 4 and you get 400k / (500 - k) as the answer ,...
<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 newspapers sales was from Newspaper A and if k percent of the newspapers that the store sold were copies of Newspaper A, which of the following expresses r in terms of k?