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。 | 
