求教700难题

christinashao

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 1percent of one's annual income. which of the following represents simplified formula for computing the income tax,in country r's currency,for a person in that country whose annual income is i?
1  50+i/200
2  50+3i/100
3  50+i/40
4   100+i/50
5   100+3i/100
谢谢大家 帮忙看看吧~~~看不懂题啊

sdcar2010

2% x i + 0.5 x ( 100 + 1% x i ) = 2.5% x i + 50


Answer C

sdcar2010

Add X to the average of ( Y and Z )

christinashao

对啊  非常感谢~~~