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标题: 请教GWD24-18 [打印本页]

作者: daizexia90 时间: 2006-6-19 06:55 标题: 请教GWD24-18

The annual interest rate earned by an investment increased by 10 percent from last year to this year. If the annual interest rate earned by the investment this year was 1 percent, what was the annual interest rate last year?

A. 1% B. 1.1% C. 9.1% D. 10% E. 10.8%

参考答案C

是不是题目错了啊?我怎么觉得答案应该是0.91%呢?取近似值应该是A了.

设要求值为X

(1+10%)X=1% ==>X=0.0091

大家快帮我看一下吧.

作者: periodic 时间: 2006-6-20 12:56

估计题目有问题吧，第二个应该是10%.

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