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标题: 请教本月机井中的29题 [打印本页]

作者: xiaochan1982    时间: 2006-1-23 07:21     标题: 请教本月机井中的29题

我发现这道题好像没人问,但我就是不太会做,希望好心人指点一下!

29。说credit card公司给用户退钱的,如果amount of charge 大于2000小于等于5000,就退1%;如果大于5000,就退2%。现在有一人退了1.3%,问他的amount of charge 多少?

选项分别是:6000,7000,8000,10000,还有一个选项写机井的同志说他忘了。


作者: thinkers    时间: 2006-1-23 13:33

设amount of charge 为X

[(5000-2000)*1%+(x-5000)*2%]/x=1.3%

X=10000

47. for certain purchase, the amount exceeds 2000 and lower than 5000 gets 1% discount, the amount exceeds 5000 get 2% discount, if the total discount is 1.3% for one purchase, what is the total amount?

My answer: 10000

同本月JJ29

设amount of charge 为X

[(5000-2000)*1%+(x-5000)*2%]/x=1.3%

X=10000






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