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Mathematics, 07.08.2021 06:00 CelesteN64

1 hàng ghế gồm 10 chiếc ghế. Có bao nhiêu cách xếp 1 đôi vợ chồng vào các ghế đó nếu: a. Họ ngồi cách nhau 1 ghế.
b. Vợ ngồi phía bên phải chồng.

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1 hàng ghế gồm 10 chiếc ghế. Có bao nhiêu cách xếp 1 đôi vợ chồng vào các ghế đó nếu: a. Họ ngồi cá...

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