「21年 公立千歳科技大 理工 1(5)」への1件のフィードバック

1. 並べ替え AAAABBCCCDE
   https://www.wolframalpha.com/input?i=%E4%B8%A6%E3%81%B9%E6%9B%BF%E3%81%88+AAAABBCCCDE&lang=ja
   11! / (4! * 2! * 3!*1!*1!)
   https://ja.wolframalpha.com/input?i=11%21+%2F+%284%21+*+2%21+*+3%21*1%21*+1%21%E3%80%80%29
   (4+2+3+1+1)! / (4! * 2! * 3!*1!* 1!)
   https://www.wolframalpha.com/input?i=%284%2B2%2B3%2B1%2B1%29%21+%2F+%284%21+*+2%21+*+3%211%21+1%21%29&lang=ja
   permutation (11, 11)/(permutation (4, 4)*permutation (2, 2)*permutation (3, 3)*permutation (1, 1)*permutation (1, 1))
   https://www.wolframalpha.com/input?i=permutation+%2811%2C+11%29%2F%28permutation+%284%2C+4%29*permutation+%282%2C+2%29*permutation+%283%2C+3%29*permutation+%281%2C+1%29*permutation+%281%2C+1%29%29&lang=ja

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