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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
b hỏi có bao nhiêu cách xếp mà nam nữ ngồi đói diện nhau
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Which speed is the fastest (use 1 mile ≈ 1.6 kilometers)? a. 12 miles/hour b. 18 feet/second c. 19 kilometers/hour d. cannot be determined
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Abag has more green balls than blue balls, and there is at least one blue ball. let bb represent the number of blue balls and let gg represent the number of green balls. let's compare the expressions 2b2b and b + gb+g. which statement is correct? choose 1
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Jordan got 27 out of 90 correct on his test . what fraction of the marks did her get correct
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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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