请教prep一数学题

chiwanlu

       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 ( arithmatic mean ) of 100 units of country R's currency and 1 percent of one's annual income. Which of the following presents the simplified formula for computing the income tax, in Country R's currency, for a person in that country whose annual income is I ?

   o     50 + I /200

   o     50 + 3I /100

   o     50 + I /40

   o     100 + I /50

   o     100 + 3I /100

mickleon

这题简直是考语文啊……

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}]

I*2%+1/2*(100+I*1%)=50+I*2.5%=50+I/40

答案C

chiwanlu

十分感谢！