Mathematics, 25.10.2021 14:00 ccollinsphotogr3177
Có 4 học sinh gồm 2 nam và 2 nữ đc xếp vào 2 dãy bàn đôis diện nhau
a hỏi có bao nhiêu cách xếp
b hỏi có bao nhiêu cách xếp mà nam nữ ngồi đói diện nhau
Answers: 2
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Có 4 học sinh gồm 2 nam và 2 nữ đc xếp vào 2 dãy bàn đôis diện nhau
a hỏi có bao nhiêu cách xếp
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