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标题: 涛涛21-14（第21套第14题）求助！ [打印本页]

作者: cateyong 时间: 2009-3-4 07:28 标题: 涛涛21-14（第21套第14题）求助！

The charge for a single room at Hotel P is 25 percent less than the charge for a single room at Hotel R and 10 percent less than the charge for a single room at Hotel G. The charge for a single room at Hotel R is what percent greater than the charge for a single room at Hotel G ?

A. 15%

B. 20%

C. 40%

D. 50%

E. 150%

如何得出答案B？

设P=1, R=1.25, G=1.1. (R-G)/G=0.15/1.1

大家看错在哪里？

作者: 小萧笑 时间: 2009-3-4 20:07

R求错了，R=5/3而不是1.25

作者: cateyong 时间: 2009-3-6 18:30

“R求错了，R=5/3而不是1.25“？

谢谢2楼，不过还是想不同R=5/3？，设P=1, R=1X(1+25%)=1.25, G=1X(1+10%)=1.1

哪位指教，谢谢！

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