[求助]马上就要考试了，一道prep数学题请教大家

slipknotjr

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+I/40
C. 100+I/50
D. 100+3I/100

这个　１００　ｕｎｉｔｓ　ｏｆ　ｃｕｒｒｅｎｃｙ　指的是什么呢？

slipknotjr

还有一道　ＤＳ　题　

说在　Ｚ　公司，　所有员工不是在Ｘ部门，　就是在　Ｙ　部门，没有同时在两个部门的员工。问

Is the ratio of the number of full-time employees to the number of part-time employees greater for Division X than for Comapny Z?

1. the ratio of the number of fulltime employees to the number of parttime employees is less for division Y than for Company Z

2. More than half of the fulltime employees of company Z are employees of Division X, and more than half of the parttime employees of company Z are employees of Division Y.

slipknotjr

h5641

以下是引用slipknotjr在2009-5-24 9:41:00的发言：

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+I/40
C. 100+I/50
D. 100+3I/100

这个　１００　ｕｎｉｔｓ　ｏｆ　ｃｕｒｒｅｎｃｙ　指的是什么呢？

這題LZ有解出？

100 units of curency 應該就是100元 (當地幣值)

slipknotjr

以下是引用h5641在2009-5-24 10:18:00的发言：

這題LZ有解出？

100 units of curency 應該就是100元 (當地幣值)

这道题解出来了，谢谢恢复

能帮我看一下那道 DS 吗？

slipknotjr

打错字了，谢谢回复

h5641

以下是引用slipknotjr在2009-5-24 9:54:00的发言：

还有一道　ＤＳ　题　

说在　Ｚ　公司，　所有员工不是在Ｘ部门，　就是在　Ｙ　部门，没有同时在两个部门的员工。问

Is the ratio of the number of full-time employees to the number of part-time employees greater for Division X than for Comapny Z?

1. the ratio of the number of fulltime employees to the number of parttime employees is less for division Y than for Company Z

2. More than half of the fulltime employees of company Z are employees of Division X, and more than half of the parttime employees of company Z are employees of Division Y.

答案是B ?

h5641

以下是引用slipknotjr在2009-5-24 10:24:00的发言：

这道题解出来了，谢谢恢复

能帮我看一下那道 DS 吗？

請問LZ 的解法？

slipknotjr

2% of income (I) = (2/100)I

1% of income (I) = (1/100)I
100 units of R's currency = 100
Average of 100 units of R's currency and 1% of I = [100+(1/100)I]/2

Average added to 2% of I = (2/100)I+[50+(1/200)I]

and simplify to get:

50 + (I/40)

h5641

以下是引用slipknotjr在2009-5-24 10:38:00的发言：

2% of income (I) = (2/100)I

1% of income (I) = (1/100)I
100 units of R's currency = 100
Average of 100 units of R's currency and 1% of I = [100+(1/100)I]/2

Average added to 2% of I = (2/100)I+[50+(1/200)I]

and simplify to get:

50 + (I/40)

是的 解法正確！

DS題 條件1似乎沒用到.