請問og-ps第213題

[fpeipei]

如題，請問各位大大可否幫忙解惑！

[huacy]

最好可以把題目貼出來, 如果對本題有疑惑
是那邊有疑惑? 還是不懂本題的意思??

[fpeipei]

題目
One week a truck rental lot had a total of 20 trucks, all of which were on the lot Monday morning. If 50 percent of the trucks that were rented out during the week were returned to the lot on or before Saturday morning of the week, and if there were at least 12 trucks on the lot that Saturday morning, what is the greatest number of different trucks that could have been rented out during the week?

答案是16
為什麼不是18勒？

og的解說看不太懂，煩請個位幫幫忙！感恩∼∼
The difference between the number of trucks on the lot on Monday and the minimum number of trucks on the lot on Saturday is 8 trucks,which is the maximum number of trucks not on the lot Satuurday morning. Since 50 percent of the trucks that were rented out during the week were returned to the lot on or before Saturday morning, the greatest number of different trucks that could have been rented out during the week was
2*8=16 or twice the mazimum number of trucks not on the lot Saturday morning.

[micht]

20*.5=10 (during the week)
10台租出去 10沒租出去

returned before Saturday.

minmum returned on or before Saturday morning of the week

Atleast 12 trucks on the lot that Saturday morning
星期六早上 至少有12台

10沒rent出去+2台回來=12

所以8台租出去還沒回來 題目說"50 percent of the trucks that were rented out during the week "


8*2=16 租出去的車最大可能值


租出去=沒租出去
一半一半
16*0.5=8

不知道偶這樣解釋可以了解嗎

[fpeipei]

:D 感謝感謝！
腦子都通了！