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Mathematics, 25.07.2021 23:00 savannahsims5847

Hai người làm chung 1 công việc và hoàn thành trong 5 giờ, năng suất mỗi người trong mỗi giờ như nhau. Trong 1 giờ cả hai người sẽ làm được số phần công việc là:

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