求助一道prep1 ps

amanda621

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

lhy19891027

可能是楼主没理解这题目的意思，翻译成中文后就蛮简单的了。
计算所得税的方法是先计算出100单位的R国货币(就是100块钱)和个人收入的1%的平均值，及(100+1%*I)/2=50+I/200；然后这个平均值加上个人收入的2%，即可得到个人所得税：50+I/200+2%*I=50+I/40。所以答案是C

amanda621

可能是楼主没理解这题目的意思，翻译成中文后就蛮简单的了。
计算所得税的方法是先计算出100单位的R国货币(就是100块钱)和个人收入的1%的平均值，及(100+1%*I)/2=50+I/200；然后这个平均值加上个人收入的2%，即可得到个人所得税：50+I/200+2%*I=50+I/40。所以答案是C

-- by 会员 lhy19891027 (2010/5/17 17:40:18)

是没读懂……谢谢~懂了