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问一题数学,不会啊,怎么就错了呢。很简单一题

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发表于 2011-12-19 19:21:34 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
3. Tickets for all but 100 seats in a 10,000-seat stadium were sold. Of the tickets sold, 20 percent were sold at half price and the remaining tickets were sold at the full price of $2. What was the total revenue from ticket sales?
A. 15,840   B. 17,820   C. $18,000    D. 19,800    E. 21,780
                                                答案B,我选的C。轻微第一句but100什么意思,难道说是10000-100?
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沙发
发表于 2011-12-19 23:33:47 | 只看该作者
你说对了。。。but 100 就是指 10000-100
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