math Flashcards by Shuo Bing Jhang

Q

What is the steps to solve permutation and combination problems

A

題目類型能否用 Cm取n

是否有重複值

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Q

如果已經決定有誰要填進空格

A

就考慮剩下的空格

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Q

如果沒有指定誰要放進來

A

就考慮有幾個可以被放進來

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