Being before simplified, the instructions for computing income tax in Country R were to add 2 person of one's annual income to the average (arithmetic mean) of 100 units of country R's currency and 1 person of one's annual income . Which of the following represents the simplified formular for computing the income tax, in Country R's currency, for a person in that country whose annual income is K ?
ANSWER IS " 50+ K/40 ".
看不太懂題意,請教了~~
THANKS A LOT~~