作者nwair (打败~~ET$$$...)
看板GMAT
标题[计量] PP1-ps73
时间Fri Jun 19 01:55:19 2009
A certmain company has 18 qually applications for 4 open positions.
How many different groups of 4 applicants can be chosen by the company to
fill the position if the order of selection dose not matter?
A)18
B)72
C)180
D)1260
E)3060 answer: E
这一题意思看不太懂 不知能否帮忙翻译一下!! 尤其是最後一句
if the order of selection dose not matter
是什麽意思??
感谢~~
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1F：推 DreamKite:C 18 取 4 就是答案,只是问组合而已 06/19 02:16
2F：→ DreamKite:最後一句话就是请你用C(组合) 不要用P(排列) 06/19 02:17