[問題]GWD數學問題
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 newspaperA, which of the following expresses r in terms of p?
答案:400p/(500-p)
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08/25 15:28, , 1F
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08/25 15:31, 3F
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