PREP PS1 175

coolya_ya

    

175.     18356-!-item-!-187;#058&011490

    

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，画线部分的句子怎么理解呢？

zacharyzhang

to add (2 percent of one's annual income) to [the average of (100 units of Country R's currency) and (1 percent of one's annual income)]

coolya_ya

清楚，明白了，谢谢。

slyx

谁能在解释的在详细些？I/40怎么算出来的

sausau

?????????????????????