标题: 求教 GWD 的数学题 [打印本页] 作者: 小货舱 时间: 2010-6-28 22:34 标题: 求教 GWD 的数学题 Q28: Last Sunday a certainstore sold copies of Newspaper A for $1.00 each and copies of Newspaper Bfor $1.25 each, and the store sold no other newspapers that day. If r percent of the store’s revenuesfrom newspaper sales was from Newspaper A and if p percent of thenewspapers that the store sold were copies of newspaper B, 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)