think easier 回複：The answer is 32

來源: mathg 於 2010-08-16 22:21:54 [] [舊帖] [給我悄悄話] 閱讀數 : (118 bytes)
回答: 排列組合 由 數學題 於 2010-07-21 23:01:59

view a pair as a single person, so we have c(3,4) but each pair can offer 2 choices. so tatol is c(3,4)*2*2*2*2 = 32.

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