问一道PREP的数学题。。主要是没有看懂题目。。万分感激~~

fay009

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?

50+I/200   50+3I/100   50+I/40  100+I/50   100+3I/100

答案是中间那个。。没有看懂题目的意思啊。。汗。。谢谢各位哦

没有人

0.02I+(100+0.01I)/2

个人收入的百分之2加上100单位货币与个人收入的百分之1的平均数

铁甲

add(2%of one's annual income) to (average of((100units))and((1%of annual income)))
这个句子太长，要找 add a to b 以及average of a and b

fay009

~（看来阅读还是不行。。）