请大家帮忙解决一道GMAT数学题目,问题的意思有点看不懂
题目:Beforebeingsimplified,theinstructionsforcomputingincometaxinCountryRweretoadd2percentofone'sannualincometotheaverage(arithmeticmean)of100unitsofCountryR'scerrencyand1percentofone'sannualincome.Whichofthefollowingrepresentsthesimplifiedformulaforcomputingtheincometax,inCountryR'scerrency,forapersoninthatcountrywhoseannualincomeisI?
A.50+(I/200)
B.50+(3I/100)
C.50+(I/40)
D.100+(I/50)
E.100+(3I/100)
答案选C.
谢谢大家了!