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[ GMAT ]
討論串[問題] Please help a "vegetable bird" like me
共 5 篇文章
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1.How many different 6-letter sequences are there that consist of 1 A, 2 B's,. and 3 C's?. A:60. 2.Apharmaceutical company received $3million in royal
(還有450個字)
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推 thdkuo:奇怪 我看到的怎麼是 3 3 5 8 取三個數 可以排成幾種三位數 09/14 19:32→ thdkuo:有人知道我說的這個要怎麼列式嗎 @@? 09/14 19:33推 catspace:三異 = 3! = 6,二同一異 = 2*3!/2! = 6 共12種 09/14 21:
(還有85個字)