※ 引述《santa ( )》之銘言：
: 175. 18356-!-item-!-187;#058&011490
: 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 (arithmetic
: mean) of 100 units of Country R's currency and 1 percent of one's annual
: income. Which of the following represents the simplified formula for
: computing the income tax, in Country R's currency, for a person in that
: country 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
: 答案是(C)
: 求救~~!! 請問題目的意思是??? 一點頭緒也沒有.. 謝謝 ><
題目的意思應該是這樣
income tax的計算方法為
add 2 percent of one's annual income to (某人的年收入的2%)
the average (arithmetic mean) of 100 units of Country R's currency and
1 percent of one's annual income
(也就是100與某人年收入百分之一 兩者的的算術平均數)
簡化成數學式如下
income tax = 0.02I + (100+0.01I)/2
計算一下即可得出 50 + I/40 (C)
希望這樣有回答到你的問題 ：）
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