1到30取7个数排列出来的所有组
答案:2 悬赏:60 手机版
解决时间 2021-02-28 20:18
- 提问者网友:趣果有间
- 2021-02-28 11:22
就是1 2 3 4 5 6 7到 24 25 26 27 28 29 30之间的
最佳答案
- 五星知识达人网友:鸠书
- 2021-02-28 12:51
基本组合问题
(30×29×28×27×26×25×24)/(7×6×5×4×3×2×1)
(30×29×28×27×26×25×24)/(7×6×5×4×3×2×1)
全部回答
- 1楼网友:野慌
- 2021-02-28 13:27
123,124,125,126,127,128,129,134,135,136,137,138,139,145,146,147,148,149,156,157,158,159,167,168,169,178,179,189,234,235,236,237,238,239,245,246,247,248,249,256,257,258,259,267,268,269,278,279,289,345,346,347,348,349,356,357,358,359,367,368,369,378,379,389,456,457,458,459,467,468,469,478,479,489,567,568,569,578,579,589,678,679,689,789
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