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Clearnote
Q&A
Senior High
Mathematics
画像の問題がわかりません。
Mathematics
Senior High
almost 10 yearsago
真田周市
画像の問題がわかりません。
組合せと順列
Answers
ゲスト
almost 10 yearsago
縦に3、横に3回曲がればいいから
並べ方は
6C3 =6×5×4 / 3×2×1
=20
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