大家帮忙看看一道PP数学题，看不懂

passat5633 · 发表于 2010-10-20 15:26:46

Before being simplified, the instructions for computing income tax in Country R were to add 2 percent of one's annual income to the average (arithmetic mean) of 100 units of Country R's currency and 1 percent of one's annual income. Which of the following represents the simplified formula for computing the income tax, in Country R's currency, for a person in that country whose annual income is I ?
A、50+I/200 B、50+3I/100 C、50+I/40 D、100+I/50 E、100+3I/100
答案是C

澹泓幽客 · 发表于 2010-10-20 15:34:34

这道我前天好像刚刚做过
就是他的税收方法是
百分之2的个人年收入加上100货币值和百分之一年收入的平均值
就是2%I+（100+1%I）/2
=1/50I+50+1/200I
=50+1/40I

passat5633 · 发表于 2010-10-20 15:39:02

这个意思啊，懂了。谢谢啊

manmanman · 发表于 2010-10-20 15:53:32

学习了

alex318 · 发表于 2010-10-20 16:10:29

学习了，看懂这题还真费劲啊。。。。。

大家帮忙看看一道PP数学题，看不懂

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