Mathematics
Senior High
Solved
分母は4!2!2!なので、4×3×2×1×2×1×2×1だと思うのですが、何故答えには2×1×2×1と書いてあるのでしょうか?🥲
57 (1) 同じ文字が4個 2個 2個あり,これら
を1列に並べるから
8!
4!2!2!
8.7.6.5
2.1×2・1
420 (通り)
IS+SSOI
Im
+ Z
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