Three salespeople are paid commissions in proportion to the amount of their sales, which total $25, 000, $40, 000, and $60,000,

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问题 Three salespeople are paid commissions in proportion to the amount of their sales, which total $25, 000, $40, 000, and $60,000, respectively. If a total of $20,000 is allocated for these three commission, what is the amount of the largest commission paid?

选项 A、$8000
B、$8400
C、$9600
D、$10000
E、$12000

答案C

解析 付给3名推销员的佣金与他们的销售额成正比,他们各自总的销售额分别为25000美元,40000美元和60000美元,若共拨出20000美元作为3人的佣金,问最大的佣金额是多少钱?
解:本题的正确答案是(C)。设最大佣金额为x美元,由题意可以得到下面的比例式:0000/(25000+40000+60000)= x/20000 → x=9600美元
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