[問題] 請問一下一題數學題
某動物園的遊園列車依序編號1到7，共有七節車廂，
今想將每節車廂畫上一種動物.
如果其中的兩節車些畫企鵝 另兩節車廂畫無尾熊 剩下的三節車廂畫上熊貓
並且要求中間的三節車廂必須有企鵝.無尾熊及熊貓
則7節車廂一共有多少種畫法?
拜託了ORZ
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※ 編輯: z56499520 (122.118.225.141), 10/11/2015 15:47:36
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