就要考了，数学还狂晕呢。请教钱永强里一题！

梦不落

请教下：钱永强数学里面有个第九题：

on a saturday night, each of the rooms at a certain motel was rented for either 40 or 60, if 10 of the rooms that were rented for 60 had instead been rented for 40, then the total rent the motel charged for that night would have been reduced by 25%. what  was the total rent the motel acturally charged for that night?

I think the answer should be 800:

可是答案意思说 实际上旅馆charge 600.

我觉得句里用的是虚拟语气。也就是实际上没有按照40收费，而是按照每个60收费。所以还是应该为800

我马上要考了，也没有找到这道题是否有讨论，只能在此发帖。希望有人帮帮忙啊！谢谢！

quanner

以下是引用梦不落在2006-5-22 20:51:00的发言：

请教下：钱永强数学里面有个第九题：

on a saturday night, each of the rooms at a certain motel was rented for either 40 or 60, if 10 of the rooms that were rented for 60 had instead been rented for 40, then the total rent the motel charged for that night would have been reduced by 25%. what  was the total rent the motel acturally charged for that night?

I think the answer should be 800:

可是答案意思说 实际上旅馆charge 600.

我觉得句里用的是虚拟语气。也就是实际上没有按照40收费，而是按照每个60收费。所以还是应该为800

我马上要考了，也没有找到这道题是否有讨论，只能在此发帖。希望有人帮帮忙啊！谢谢！

我也算出来800

10*20/25%

怎么会是600呢?

elena_cylu

My answer is 800 too.

梦不落

只能理解是答案错了。。。觉得自己理解没错。。谢谢各位！

yaoyao99

Nonono, 600 is right.  It's tricky, the way they worded it.

What the hotel would have gotten is 800 (your calculation is right) but because they lost the 25% by renting rooms that should have been $60/night for $40/night, they only earned 800-200 that night.  The final answer should be 600.

Hope that's clear, =)

quanner

I got it!

3X!

 

yaoyao99

10 of the rooms that were rented for 60 had instead been rented for 40

    
The price of the 10 rooms:
Usually: $60/night
Tonight: $40/night

[此贴子已经被作者于2006-5-24 22:38:13编辑过]

梦不落

我再理解理解吧。。。。真得很感谢楼上！！！！

yaoyao99

No problem!  Let me know if you are still confused.  We'll discuss some more, =)