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| 2017/06/17 05:22:35瀏覽42｜回應0｜推薦0 | |
| 標題: simple maths question? 發問:
此文章來自奇摩知識+如有不便請留言告知 there are 13 boys and 17 girls in a class if a team of 32 girls and 2 boys are selected from the class to participate the voluntary services ,how many different teams can be formed? 答案係用C 利計 但點解唔可以用P利計 thank u very much. 更新: it should be 3 girls最佳解答: (17x16x15/3!)x(13x12/2!)=53040 女的組合數 x 男的組合數 其他解答: |
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| ( 知識學習｜隨堂筆記 ) |
