一道GRE数学题,求详解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

2020-05-31

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一道GRE数学题,求详解
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

优质解答

我懂了,重新翻译：
简单翻译：国家R的ZF要加税,原来是100块和1%的个人收入的算数平均数,也就是加起来除以2,现在要再加上2%的个人收入.
原来是(100+I/100)/2=50+I/200,然后再加上(I/100)*2=I/50
所以加起来就是50+I/200+I/50=50+I/40
选C 我懂了,重新翻译：
简单翻译：国家R的ZF要加税,原来是100块和1%的个人收入的算数平均数,也就是加起来除以2,现在要再加上2%的个人收入.
原来是(100+I/100)/2=50+I/200,然后再加上(I/100)*2=I/50
所以加起来就是50+I/200+I/50=50+I/40
选C