请教一道prep题，十分感谢！

letayy

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 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?

 

答案是50+I/40

题目是什么意思。。。。。不懂不懂。。。。。

请大家帮助。。。。万分感谢。。。。

shining_spag

难道是：年收入I的2％加上100和年收入I的1％的平均数=2%I+(100+1%I)/2=2%I+0.5%I+50=2.5%I+50=I/40+50 ???

这题真是诡异啊～～

howren

 楼上的方法是对的,正好是答案的值

2%I+(100+1%I)/2=(50+I)/40

jonol

果然够晕的。。。。。。。。

dianecarton

100 units of Country R’s currency 当作100算，记住了，但不理解。

letayy

懂了，谢谢！！！！！！非常的谢谢！！！！