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标题: 求助 GWD 1-19 [打印本页]

作者: mandying 时间: 2009-12-6 20:44 标题: 求助 GWD 1-19

Q19:

A total of $60,000 was invested for one year. But of this amount earned simple annual
interest at the rate of x percent per year, and the rest earned simple annual
interest at the rate of y percent per year.
If the total interest earned by the $60,000 for that year was $4,080,
what is the value of x?

(1)
x = (3/4) y

(2) The ratio of the amount that earned interest
at the rate of x percent per year to the amount that earned interest at the
rate of y percent per year was 3 to 2.

正确答案是C, 我选的是D。

但其实，这题我有点没读懂，不太确定在题里，X和Y 是什么关系，两个不同的独立的 interest rate?

望得到高人指点，谢谢。

作者: painstak 时间: 2009-12-7 07:22

我也不懂等答案···

作者: qurssrou 时间: 2009-12-9 07:07

我认识是这个意思，60，000中有一部分钱采用x利率，另一部分采用y利率
一共获得了$4,080利息，问采用x利率和y利率的钱各有多少

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