[求助]请教prep ps1的一道化简题，详解版上没有答案

sudashui

论坛搜索未果。

恕我愚钝，我题目都没看懂，它到底问什么？

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/100
(B) 50+3I/100
(C) 50+I/40
(D) 100+I/50
(E) 100+3I/300

答案：C

synn

2%×I+（100+1%×I）/2

sudashui

明白了，谢谢ls!