发个Prep数学的题，题目都没怎么看明白

piacia

before being simolified, 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 contry r's currency and 1 percent of one's annual income. which fo the following represents the simplified formula for computing the income tax,in country r's cunrrency, for a person in that contry 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


我选了E, 答案是C， 大家一起讨论下

萱岚芷雅

2%I+(100+1%I)/2=2I/100+50+I/200=50+I/40

honeydd

"add 2 percent of one's annual income  to the average of 100 units of contry r's currency and 1 percent of one's annual income"

这句话用数学式子表示为：2%I+(100+1%I)/2
我猜 “100 units of contry r's currency” 是不是就理解成100？（一个货币单位的100倍）

piacia

按照答案来推回去应该是这样了